string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%9C%80%E5%A5%BD%E5%90%AC%E7%9A%84%E9%9F%B3%E4%B9%90%E5%A4%A7%E5%85%A8 => Failed to connect to 101.89.117.144 port 38005: Connection refused"
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