string(230) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%8B%BC%E5%A4%9A%E5%A4%9A0%E5%85%83%E5%BC%80%E7%BD%91%E5%BA%97 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
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