string(294) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%8A%95%E8%AF%89%E5%95%86%E5%AE%B6%E6%80%8E%E6%A0%B7%E7%BB%99%E5%AE%98%E6%96%B9%E5%AE%A2%E6%9C%8D%E7%95%99%E8%A8%80%E5%91%A2 => Failed to connect to 101.89.117.144 port 38005: Connection refused"
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