string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8C%97%E4%BA%AC%E5%A4%96%E8%B4%B8%E6%9C%8D%E8%A3%85%E5%BA%97%E5%9C%B0%E5%9D%80 => Failed to connect to 14.18.117.71 port 38069: Connection refused"
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