string(267) "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%9C%89%E4%BB%80%E4%B9%88%E7%89%B9%E7%82%B9 => Failed to connect to 101.89.117.144 port 38076: Connection refused"
互联网的发展有什么特点
