string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%BE%AE%E4%BF%A1%E6%80%8E%E4%B9%88%E5%B1%95%E7%A4%BA%E5%BE%AE%E5%BA%97 => Failed to connect to 101.89.143.195 port 38175: Connection refused"
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