string(319) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A8%81%E8%AE%AF%E8%81%94%E5%90%88%E5%8D%8A%E5%AF%BC%E4%BD%93%E6%9C%89%E9%99%90%E5%85%AC%E5%8F%B8%E7%94%B5%E8%AF%9D%E5%8F%B7%E7%A0%81%E6%9F%A5%E8%AF%A2 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
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