string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8D%96%E6%88%BF%E5%B9%BF%E5%91%8A%E5%8F%B0%E8%AF%8D%E5%A4%A7%E5%85%A8 => Failed to connect to 14.18.117.71 port 38069: Connection refused"
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