string(242) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%9C%80%E5%BF%AB%E7%9A%84f1%E8%B5%9B%E9%81%93%E6%95%91%E6%8F%B4%E8%BD%A6 => Failed to connect to 101.89.143.195 port 38175: Connection refused"
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