string(238) "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%E7%9A%84%E5%8F%91%E5%B1%95%E6%83%85%E5%86%B5 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
互联网的发展情况
