string(294) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%93%AA%E4%B8%AA%E6%B5%8F%E8%A7%88%E5%99%A8%E5%A5%BD%E7%94%A8%E5%8F%88%E5%BF%AB%E7%94%B5%E8%84%91%E7%89%88%E5%85%8D%E8%B4%B9 => Failed to connect to 101.89.143.195 port 38109: Connection refused"
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