string(294) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B7%98%E5%AE%9D%E5%AE%A2%E6%9C%8D%E5%82%AC%E5%8D%95%E5%B9%BD%E9%BB%98%E8%AF%9D%E6%9C%AF%E5%9B%BE%E7%89%87%E6%90%9E%E7%AC%91 => Failed to connect to 101.89.143.195 port 38205: Connection refused"
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