string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BB%B7%E6%A0%BC%E7%AD%96%E7%95%A5%E7%9A%84%E5%AE%9A%E4%B9%89 => Failed to connect to 101.89.117.144 port 38017: Connection refused"
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