string(283) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%92%E8%81%94%E7%BD%91%E6%8A%80%E6%9C%AF%E5%8F%91%E5%B1%95%E4%B8%8E%E8%B6%8B%E5%8A%BF%E7%9A%84%E7%AD%94%E8%BE%A9 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
互联网技术发展与趋势的答辩
