string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BC%81%E4%B8%9A%E7%BD%91%E7%AB%99%E5%9B%BE%E7%89%87%E7%B4%A0%E6%9D%90 => Failed to connect to 101.89.143.195 port 38175: Connection refused"
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