string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%99%95%E8%A5%BF%E4%BA%8C%E5%BB%BA%E7%AD%94%E6%A1%88%E7%BE%A4 => Failed to connect to 101.89.143.195 port 38109: Connection refused"
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