string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A5%B3%E8%A3%A4%E5%8D%81%E5%A4%A7%E5%93%81%E7%89%8C%E4%B9%B0%E8%B4%AD%E7%BD%91 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
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