string(211) "get document error:https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%AE%B8%E6%98%8E%E8%BE%89%E7%99%BE%E7%A7%91 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
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