string(211) "get document error:https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%88%9D%E5%AD%A6%E5%8C%85%E9%A5%BA%E5%AD%90 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
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