string(211) "get document error:https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%97%AB%E5%8D%8E%E7%BA%A2%E8%AE%B2%E4%B9%89 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
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