string(264) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%93%AA%E4%B8%AA%E6%B5%8F%E8%A7%88%E5%99%A8%E6%AF%94%E8%BE%83%E7%A8%B3%E5%AE%9A%E4%B8%80%E7%82%B9 => Failed to connect to 14.18.46.51 port 38206: Connection refused"
哪个浏览器比较稳定一点
