string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%B0%83%E5%91%B3%E5%93%81%E4%BC%81%E4%B8%9A%E6%8E%92%E5%90%8D => Failed to connect to 101.89.117.144 port 38005: Connection refused"
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