string(283) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%AE%A1%E7%AE%97%E6%9C%BA%E5%88%9D%E5%AD%A6%E8%80%85%E5%85%A5%E9%97%A8%E6%95%99%E7%A8%8B%E7%99%BE%E5%BA%A6%E4%BA%91 => Failed to connect to 14.18.117.71 port 38093: Connection refused"
计算机初学者入门教程百度云
