{"id":1733,"date":"2013-03-16T23:07:49","date_gmt":"2013-03-16T15:07:49","guid":{"rendered":"http:\/\/www.yewen.us\/blog\/?p=1733"},"modified":"2013-03-16T23:07:49","modified_gmt":"2013-03-16T15:07:49","slug":"push-or-pull-on-sns","status":"publish","type":"post","link":"https:\/\/www.yewen.us\/blog\/2013\/03\/push-or-pull-on-sns\/","title":{"rendered":"SNS \u80cc\u540e\u7684\u6280\u672f: \u6d88\u606f\u6d41\u7684\u63a8\u62c9\u6a21\u5f0f\u9009\u62e9"},"content":{"rendered":"<p>\u4e0a\u4e00\u7bc7\u626f\u5230 SNS \u672c\u8d28\u4e0a\u8fd8\u662f\u8981\u6ee1\u8db3\u6c9f\u901a\u9700\u8981, \u65e2\u7136\u6709\u6c9f\u901a\u5c31\u6d89\u53ca\u5230\u4fe1\u606f\u672c\u4f53\u7684\u4f20\u64ad, \u66fe\u7ecf\u7684\u5404\u79cd\u4f20\u64ad\u65b9\u5f0f\u591a\u534a\u91c7\u7528\u628a\u4fe1\u606f\u4ece\u6d88\u606f\u6e90\u63a8\u9001\u5230\u63a5\u6536\u8005, \u7531\u63a5\u6536\u8005\u7528\u6536\u4ef6\u7bb1\u4fdd\u5b58\u5e76\u67e5\u770b\u7684\u65b9\u5f0f\u5b9e\u73b0, \u6bd4\u5982\u77ed\u4fe1, 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\u4e0a\u8fd9\u6761\u65b0\u7684\u8fb9\u505a\u6d88\u606f\u63a8\u9001, \u8fd9\u65f6\u5019\u8fd8\u8981\u4f9d\u8d56\u53d1\u4ef6\u7bb1, \u5373\u63a8\u6a21\u5f0f\u65e0\u6cd5\u629b\u5f03\u53d1\u4ef6\u7bb1\u6a21\u5757. \u800c\u5982\u679c\u662f\u5220\u9664\u597d\u53cb\u5173\u7cfb, \u4e5f\u5e94\u8be5\u7acb\u5373\u628a\u8fd9\u6761\u8fb9\u505a\u4e2a\u9006\u64cd\u4f5c, \u8fd9\u4e2a\u64cd\u4f5c\u66f4\u91cd, \u9700\u8981\u626b\u6536\u4ef6\u7bb1\u7684\u6240\u6709\u5185\u5bb9\u5e76\u5220\u9664\u7279\u5b9a\u7684\u6d88\u606f. \u4e07\u4e00\u8fd8\u6709\u7528\u6237\u6ce8\u9500, \u6216\u662f spammer \u88ab\u5c01\u9700\u8981\u6536\u56de\u5176\u53d1\u51fa\u53bb\u7684\u5404\u79cd\u5783\u573e\u4fe1\u606f, \u6216\u662f\u88ab XSS\/CSRF \u653b\u51fb\u540e\u8981\u505a\u6e05\u7406, \u90fd\u9700\u8981\u5bf9\u5927\u91cf\u7528\u6237\u7684\u6536\u4ef6\u7bb1\u505a\u626b\u63cf\u548c\u9009\u62e9\u6027\u5220\u9664, \u8fd9\u4e9b\u64cd\u4f5c\u65e2\u91cd\u53c8\u8981\u6c42\u5f88\u9ad8\u7684\u65f6\u6548\u6027, \u5426\u5219\u5c31\u53ef\u80fd\u662f\u5b89\u5168\u4e8b\u6545, \u8fd9\u4e9b\u90fd\u8ba9\u63a8\u6a21\u5f0f\u4e0b cache \u7684\u8bbe\u8ba1\u521d\u8877\u88ab\u7834\u574f\u7684\u4e00\u584c\u7cca\u6d82<\/p>\n<p>\u518d\u8bf4\u9690\u79c1\u63a7\u5236, \u6700\u65e9\u7684 SNS \u538b\u6839\u5c31\u6ca1\u6709\u9690\u79c1\u8fd9\u56de\u4e8b, \u53d1\u51fa\u53bb\u7684\u4e1c\u897f\u8c01\u90fd\u53ef\u4ee5\u770b\u53ef\u4ee5\u8bc4\u8bba\u53ef\u4ee5\u5206\u4eab\u53ef\u4ee5\u505a\u4efb\u4f55\u6f14\u7ece\u64cd\u4f5c, \u53ea\u662f\u6211\u7684\u597d\u53cb\u80fd\u6709\u4e2a\u7b80\u5355\u5feb\u6377\u7684\u5165\u53e3\u627e\u5230, \u540e\u6765\u5c31\u6709\u4e86\u4ec5\u597d\u53cb\u53ef\u89c1, \u53d1\u9001\u7ed9\u6307\u5b9a\u5206\u7ec4 (\u5176\u5b9e\u662f\u53d1\u9001\u7ed9\u7279\u5b9a\u7684\u67d0\u4e9b\u4eba\u7684\u7b80\u5316\u7248), \u4e0d\u53ef\u5206\u4eab\u4e0d\u53ef\u56de\u590d\u7b49\u5404\u79cd\u8981\u6c42, \u5982\u679c\u8fd9\u4e2a\u8981\u6c42\u4e00\u76f4\u90fd\u662f\u56fa\u5b9a\u7684\u4e5f\u8fd8\u597d, 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\u662f\u4e0d\u662f\u5c31\u80fd\u89e3\u51b3\u95ee\u9898\u5462? \u597d\u50cf\u662f? \u4f46\u662f\u63a8\u6a21\u5f0f\u4e0b\u6bcf\u6b21\u4ece\u6536\u4ef6\u7bb1\u7ed9\u7528\u6237\u663e\u793a\u6d88\u606f\u65f6\u8fd8\u52a0\u4e00\u6b21\u5224\u65ad, \u8fd9\u4e0d\u8fd8\u662f\u5728\u505a\u62c9\u64cd\u4f5c\u4e48? \u5e26\u4e86\u62c9\u64cd\u4f5c\u7684\u63a8\u6a21\u5f0f? \u90a3\u4e3a\u4ec0\u4e48\u4e0d\u76f4\u63a5\u6539\u62c9\u6a21\u5f0f, \u8fd8\u8282\u7701 cache<\/p>\n<p>\u518d\u56de\u5230\u63a8\u6a21\u5f0f\u66f4\u5feb\u7684\u7528\u6237\u4f53\u9a8c, \u65e2\u7136\u52a0\u4e86\u6743\u9650\u9a8c\u8bc1\u7b49\u64cd\u4f5c, \u90a3\u8fd9\u4e2a\u7528\u6237\u4f53\u9a8c\u4f30\u8ba1\u4e5f\u7701\u4e0d\u5230\u54ea\u53bb, \u800c\u4e14 \u53d1\u9001-\u9a8c\u8bc1-\u5230\u6536\u4ef6\u7bb1 \u548c \u62c9\u53d6-\u9a8c\u8bc1-\u53d6\u53d1\u4ef6\u7bb1 \u90fd\u662f\u4e09\u6b65\u64cd\u4f5c, \u8c01\u4e5f\u6ca1\u6709\u66f4\u7b80\u5355, 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\u8ba9\u6b64 cache \u5931\u6548, \u4e0b\u6b21\u8fd8\u8d70\u7eaf\u62c9\u6a21\u5f0f\u5e94\u8be5\u5c31\u80fd\u641e\u5b9a<\/p>\n<p>\u4e0a\u9762\u90fd\u662f\u7406\u8bba\u626f\u6de1, \u5177\u4f53\u5e94\u7528\u8fd8\u662f\u8981\u770b SNS \u6a21\u578b\u548c\u6d88\u606f\u6a21\u578b\u6765\u51b3\u5b9a\u600e\u4e48\u7528\u597d. \u4ee5\u4e0b\u6839\u636e\u516c\u5f00\u8d44\u6599\u548c\u4e2a\u4eba\u731c\u6d4b\u6765\u516b\u5366\u4e0b\u5404\u5bb6\u7684\u505a\u6cd5<\/p>\n<p>Twitter \u516c\u5f00\u8d44\u6599\u8bf4\u4ed6\u4eec\u8d70\u7684\u63a8\u62c9\u7ed3\u5408, \u6709 cache, \u4f46\u662f\u5927\u90e8\u5206\u8fd8\u662f\u7528\u62c9\u7684\u64cd\u4f5c, \u5f88\u591a\u8c03\u7528\u6765\u6e90\u662f\u79fb\u52a8\u7aef\u6216 API, \u6162\u70b9\u5c31\u6162\u70b9\u5927\u5bb6\u90fd\u65e0\u6240\u8c13, \u7b2c\u4e09\u65b9 API \u672c\u8eab\u5c31\u662f\u5728\u5b9a\u671f\u505a\u62c9\u64cd\u4f5c\u4ee5\u53d8\u76f8\u5b8c\u6210\u63a8\u6a21\u5f0f, \u800c\u4e14\u53d1\u51fa\u53bb\u7684\u4e1c\u897f\u5bb9\u6613\u6536\u4e0d\u56de<\/p>\n<p>Facebook \u5bf9\u79bb\u7ebf\u7528\u6237\u5e94\u8be5\u662f\u62c9\u6a21\u5f0f\u52a0\u6536\u4ef6\u7bb1 cache, \u7528\u4e0d\u7ecf\u5e38\u767b\u9646\u7684\u5c0f\u53f7\u5f88\u5bb9\u6613\u9a8c\u8bc1, \u53ea\u8981\u7a0d\u5fae\u6709\u51e0\u5929\u6ca1\u767b\u9646, \u4e00\u4e0a\u53bb news feed \u4e5f\u4e00\u5b9a\u662f\u7a7a\u7684, \u8981\u6709\u53d6\u7684\u7b49\u5f85\u65f6\u95f4, \u800c\u4e14\u660e\u663e\u4e0d\u662f\u56e0\u4e3a\u7ffb\u5899\u5e26\u6765\u7684\u5ef6\u8fdf. \u800c\u4e14 FB \u5bf9 news feed \u9ed8\u8ba4\u4e0d\u91c7\u7528\u65f6\u95f4\u5e8f, \u5982\u679c\u7528\u63a8\u6a21\u5f0f\u7528\u6237\u67e5\u770b\u65f6\u4ece\u6536\u4ef6\u7bb1\u53d6\u8fd8\u662f\u8981\u505a\u4e00\u6b21\u6392\u5e8f, \u4e14\u8fd9\u4e2a\u6392\u5e8f\u64cd\u4f5c\u4e0d\u662f\u975e\u5e38\u8f7b, \u90a3\u518d\u524d\u9762\u5957\u4e00\u5c42\u62c9\u64cd\u4f5c\u5f71\u54cd\u4e5f\u4e0d\u4f1a\u5927, \u8fd8\u4e0d\u5982\u76f4\u63a5\u8d70\u62c9\u6a21\u5f0f, \u5c31\u7b97\u8003\u8651\u70ed\u70b9\u7528\u6237\u88ab\u62c9\u7684\u64cd\u4f5c\u4f1a\u5f88\u9891\u7e41\u673a\u5668\u625b\u4e0d\u4f4f, \u90a3\u540c\u6b65\u51e0\u4efd\u53d1\u4ef6\u7bb1\u5bf9\u62c9\u64cd\u4f5c\u505a\u8d1f\u8f7d\u5747\u8861\u5c31\u53ef\u4ee5\u4e86, \u6bd4\u8d77\u7528\u63a8\u6a21\u5f0f 100 \u500d\u4ee5\u4e0a\u7684\u673a\u5668\u9700\u6c42, \u5982\u679c\u771f\u7684\u5927\u91cf\u5b58\u5728\u70ed\u70b9, \u62c9\u6a21\u5f0f\u589e\u52a0\u5341\u500d\u673a\u5668\u968f\u4fbf\u5c31\u80fd\u89e3\u51b3\u8fd9\u4e2a\u6027\u80fd\u95ee\u9898. \u4e0d\u8fc7\u5982\u679c\u7528\u6237\u5728\u7ebf, \u5219\u63a8\u6a21\u5f0f\u751f\u6548, \u6709\u65b0\u6d88\u606f\u4f1a\u7acb\u9a6c\u63a8\u9001\u5230 news feed \u6216 ticker \u91cc\u6765, \u53ea\u662f\u65b0\u6765\u7684\u6d88\u606f\u53ea\u80fd\u6309\u65f6\u95f4\u5e8f\u653e\u6700\u65b0\u7684\u5730\u65b9\u4e86. \u53e6\u5916\u5220\u9664\u8fd8\u662f\u4e00\u4e2a\u8001\u5927\u96be\u95ee\u9898, \u7ecf\u5e38\u53d1\u73b0\u6709\u597d\u53cb\u88ab\u653b\u51fb\u540e\u53d1\u7684\u5783\u573e\u6d88\u606f\u8981\u8fc7\u5f88\u4e45\u624d\u4f1a\u88ab\u5e72\u6389 (\u9000\u51fa\u540e cache \u5931\u6548\u4e0b\u4e00\u6b21\u767b\u9646\u6539\u62c9\u64cd\u4f5c\u624d\u53bb\u6389\u7684?)<\/p>\n<p>\u65b0\u6d6a\u5fae\u535a\u53f7\u79f0\u4ed6\u4eec\u7528\u63a8\u62c9\u7ed3\u5408, \u4e0d\u8fc7\u636e\u6211\u89c2\u5bdf\u548c\u5c0f\u9053\u6d88\u606f\u5e94\u8be5\u8fd8\u662f\u7eaf\u62c9\u52a0\u5f88\u5c0f\u7684 cache, \u56e0\u4e3a\u65b0\u6d6a\u5fae\u535a\u6d3b\u8dc3\u7684\u90fd\u662f\u4e00\u7fa4\u516c\u77e5\u5927\u53f7, \u7ed9\u4ed6\u4eec\u7684\u6d88\u606f\u505a\u63a8\u64cd\u4f5c\u4f1a\u628a\u7f51\u7edc\u538b\u6b7b (\u53e6\u5916\u5410\u4e2a\u69fd\u8349\u6839\u5927\u53f7\u7684\u8fd0\u8425\u4eba\u5458\u90fd\u662f\u51c6\u70b9\u4e0a\u73ed\u7684, \u4ed6\u4eec\u4f1a\u51e0\u4e4e\u540c\u65f6\u53d1\u5927\u91cf\u5185\u5bb9, \u8fd9\u4e00\u77ac\u95f4\u5982\u679c\u7528\u63a8\u4f30\u8ba1\u5c31\u628a\u5168\u7f51\u7ed9\u641e\u55dd\u5c41\u4e86). \u5bf9\u7528\u6237\u800c\u8a00, \u767b\u9646\u65f6\u62c9\u51fa\u4e00\u6574\u9875\u7684\u5185\u5bb9\u653e cache, \u5c31\u65b0\u6d6a\u90a3\u4e2a\u524d\u7aef\u52a0\u8f7d\u901f\u5ea6, \u7edd\u5bf9\u4e0d\u6bd4\u540e\u53f0\u505a\u4e00\u6b21\u62c9\u64cd\u4f5c\u5feb, \u6240\u4ee5\u7528\u6237\u51e0\u4e4e\u611f\u89c9\u4e0d\u5230, \u7b49\u7528\u6237\u5f80\u4e0b\u6eda\u52a8\u9875\u9762\u65f6\u5019\u4f9d\u6b21\u5410\u51fa cache \u5185\u5bb9, \u901f\u5ea6\u98de\u5feb\u4f53\u9a8c\u5b8c\u7f8e, \u5410\u5b8c\u4e86\u5c31\u8be5\u624b\u52a8\u7ffb\u9875\u4e86, \u4e0d\u8fc7\u6709\u591a\u5c11\u4eba\u4f1a\u5f80\u540e\u7ffb? \u6839\u636e\u6211\u5728\u641c\u7d22\u4e0a\u7684\u7ecf\u9a8c, \u5e94\u8be5\u4e0d\u5230 10%, \u800c\u8fd9\u65f6\u5019\u6162\u70b9\u5927\u5bb6\u4e5f\u8fd8\u662f\u53ef\u4ee5\u5fcd, \u90fd\u4e3b\u52a8\u7ffb\u4e86\u8fd8\u5728\u4e4e\u8fd9\u4e00\u4e24\u79d2? \u5728\u5929\u671d\u653f\u6cbb\u6b63\u786e\u5f88\u91cd\u8981, \u6240\u4ee5\u5fae\u535a\u5220\u5e16\u7684\u6548\u7387\u4e5f\u4e00\u5b9a\u8981\u9ad8, \u4ee5\u5fae\u535a\u7684\u5220\u5e16\u91cf, \u8d70\u63a8\u6a21\u5f0f\u4f30\u8ba1\u8fd8\u662f\u4f1a\u628a\u7f51\u7edc\u62d6\u6302, \u800c\u62c9\u6a21\u5f0f\u4e0b\u53ea\u8981\u5224\u65ad\u4e0b\u6700\u539f\u59cb\u5fae\u535a\u662f\u5426\u4e0d\u5b58\u5728\u6216\u5c5e\u88ab\u8bc1\u5b9e\u7684\u8c23\u8a00\u5c31 OK<\/p>\n<p>QQ \u7a7a\u95f4\u8d70\u7684\u5e94\u8be5\u662f\u63a8, \u5927\u90e8\u5206\u65f6\u95f4\u90fd\u4e00\u4ebf\u591a\u7528\u6237\u5728\u7ebf, \u7a7a\u95f4\u4e0a\u6709\u70b9\u65b0\u52a8\u6001\u8fd8\u662f\u5f88\u5feb\u4f1a\u5728 QQ \u9762\u677f\u4e0a\u8df3\u6570\u5b57, \u800c\u4e14\u817e\u8baf\u4e00\u76f4\u505a\u7684\u662f\u5b9e\u65f6\u901a\u8baf, \u5728\u5b9e\u65f6\u8fc7\u6ee4\u9ec4\u53cd\u65b9\u9762\u7ecf\u9a8c\u597d\u7684\u5f88, \u57fa\u672c\u4e0d\u7528\u62c5\u5fc3\u6709\u592a\u591a\u7c7b\u4f3c\u5220\u5e16\u7684\u66f4\u65b0\u64cd\u4f5c\u628a\u7f51\u7edc\u5f04\u7684\u5f88\u5d29\u6e83. \u4e0d\u8fc7\u5177\u4f53\u5230 QQ \u7a7a\u95f4\u91cc\u7684\u4e00\u4e9b\u6a21\u5757, \u6bd4\u5982\u4e2a\u4eba\u4e3b\u9875\u7b49, \u90a3\u5c31\u770b\u5e94\u7528\u573a\u666f\u662f\u63a8\u8fd8\u662f\u62c9\u4e86<\/p>\n<p>\u81f3\u4e8e\u4eba\u4eba, \u53ef\u80fd\u4f1a\u6bd4\u8f83\u654f\u611f\u4e0d\u4fbf\u591a\u8bf4, \u4e4b\u524d\u53f7\u79f0\u662f\u63a8\u62c9\u7ed3\u5408, \u4e0d\u8fc7\u5728\u6211\u770b\u6765\u5c31\u662f\u4e2a\u6bd4\u8f83\u5355\u7eaf\u7684\u63a8\u6a21\u5f0f, \u4e14\u76ee\u524d\u770b\u6765\u63a8\u6a21\u5f0f\u7684\u5404\u79cd\u5751\u7239\u95ee\u9898\u90fd\u5b58\u5728, \u6bd4\u5982 cache \u5360\u7528\u592a\u591a\u8d44\u6e90, \u5220\u9664\u64cd\u4f5c\u591a\u4e14\u96be\u505a\u5230\u5b9e\u65f6\u7b49\u7b49\u90fd\u6709. \u8fd8\u56e0\u4e3a\u662f\u63a8\u6a21\u5f0f, \u6574\u4e2a\u9690\u79c1\u6846\u67b6\u4e5f\u96be\u6709\u5927\u7684\u6539\u8fdb<\/p>\n<p>\u6700\u540e\u7ed9\u5927\u5bb6\u778e\u63b0\u4e00\u4e9b\u6570\u636e\u7b97\u7b97\u4e0d\u540c\u6a21\u5f0f\u7684 cache \u9700\u6c42 (\u5305\u62ec\u603b cache \u5927\u5c0f\u548c\u4e3a\u8d1f\u8f7d\u5747\u8861\u7528\u7684\u673a\u5668\u6570) \u548c\u7f51\u7edc\u5f00\u9500 (\u5305\u62ec\u8c03\u7528\u91cf\u548c\u5e26\u5bbd), \u770b\u5230\u5e95\u600e\u6837\u597d (\u4ee5\u4e0b\u6d89\u53ca\u5230\u5e73\u5747\u7684\u6570\u5b57\u591a\u534a\u90fd\u662f\u957f\u5c3e\u5206\u5e03):<br \/>\nA. \u67d0\u7f51, \u65e5\u6d3b\u8dc3\u7528\u6237 10M, \u6708\u6d3b\u8dc3\u7528\u6237 50M, \u603b\u7528\u6237 100M, \u5e73\u5747\u6bcf\u4e2a\u4eba\u6709 150 \u4e2a\u53cc\u5411\u597d\u53cb, \u6bcf\u4e2a\u6d3b\u8dc3\u7528\u6237\u5728\u6d3b\u8dc3\u5929\u5185\u5e73\u5747\u6709 10 \u6b21\u67e5\u770b\u64cd\u4f5c, \u5e73\u5747\u6bcf\u6b21\u64cd\u4f5c\u53d6 20 \u6761\u6d88\u606f, \u5e76\u6709\u5e73\u5747 3 \u6b21\u6d88\u606f\u53d1\u5e03\u64cd\u4f5c, \u6bcf\u6761\u6d88\u606f\u7d22\u5f15 1K, \u6d88\u606f\u672c\u4f53 20K<br \/>\nB. \u67d0\u7f51, \u65e5\u6d3b\u8dc3\u7528\u6237 15M, \u6708\u6d3b\u8dc3\u7528\u6237 60M, \u603b\u7528\u6237 200M, \u5e73\u5747\u6bcf\u4e2a\u4eba\u6709 100 \u4e2a\u5355\u5411\u51fa\u597d\u53cb\u8fb9\u548c 200 \u4e2a\u5355\u5411\u5165\u597d\u53cb\u8fb9, \u6bcf\u4e2a\u6d3b\u8dc3\u7528\u6237\u5728\u6d3b\u8dc3\u5929\u5185\u5e73\u5747\u6709 20 \u6b21\u67e5\u770b\u64cd\u4f5c, \u5e73\u5747\u6bcf\u6b21\u64cd\u4f5c\u53d6 10 \u6761\u6d88\u606f, \u5e76\u6709\u5e73\u5747 2 \u6b21\u6d88\u606f\u53d1\u5e03\u64cd\u4f5c, \u6bcf\u6761\u6d88\u606f\u7d22\u5f15 1K, \u6d88\u606f\u672c\u4f53 2K<\/p>\n<p>\u6781\u7aef\u60c5\u51b5 1: \u5982\u679c\u6d88\u606f\u53d1\u9001\u8005\u90fd\u662f\u51fa\u8fb9\u6570\u5728 M \u8fd9\u4e2a\u7ea7\u522b\u4e14\u5176\u6bcf\u5929\u53d1\u9001\u91cf\u8981\u6bd4\u5e73\u5747\u503c\u9ad8\u4e00\u4e24\u4e2a\u6570\u91cf\u7ea7\u7684\u600e\u4e48\u529e? (\u6bd4\u5982\u65b0\u6d6a\u5fae\u535a\u7684\u5404\u79cd\u5927\u53f7, \u7b97\u5b8c\u540e\u4f30\u8ba1\u4f60\u4e5f\u4f1a\u7406\u89e3\u9664\u4e86\u5546\u4e1a\u539f\u56e0, \u67d0\u4e9b\u67b6\u6784\u4e0b\u6280\u672f\u539f\u56e0\u4e5f\u8fd8\u662f\u5bf9\u4ed6\u4eec\u505a\u70b9\u9650\u5236\u597d)<br \/>\n\u6781\u7aef\u60c5\u51b5 2: \u5982\u679c\u6d88\u606f\u67e5\u770b\u8005\u7684\u5165\u8fb9\u6570\u90fd\u5728 K \u8fd9\u4e2a\u7ea7\u522b\u4e14\u5176\u6bcf\u5929\u7684\u67e5\u770b\u64cd\u4f5c\u6bd4\u5e73\u5747\u503c\u9ad8\u4e00\u4e24\u4e2a\u6570\u91cf\u7ea7\u600e\u4e48\u529e? 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