string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BD%AA%E6%81%B6%E9%83%BD%E5%B8%82%E5%85%A8%E9%83%A8%E5%BD%A9%E8%9B%8B => Failed to connect to 61.171.74.35 port 38041: Connection refused"
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