string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9F%A5%E4%B9%8E%E6%80%8E%E4%B9%88%E9%82%80%E8%AF%B7%E9%A2%84%E8%A7%88 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
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