string(294) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%BE%AE%E4%BF%A1%E8%AE%BE%E7%BD%AE%E6%88%90%E5%95%86%E5%AE%B6%E6%94%B6%E6%AC%BE%E6%9C%89%E4%BB%80%E4%B9%88%E5%A5%BD%E5%A4%84 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
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