string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B7%98%E6%B0%94%E5%80%BC%E6%AF%8F%E4%B8%AA%E6%9C%88%E6%9B%B4%E6%96%B0 => Failed to connect to 101.89.143.195 port 38175: Connection refused"
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