string(243) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%96%87%E8%8E%B1%E5%B8%8110000%E5%85%91%E6%8D%A2%E4%BA%BA%E6%B0%91%E5%B8%81 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
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