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%E6%96%B0%E6%8A%80%E6%9C%AF%E6%96%B0%E5%BA%94%E7%94%A8%E7%A0%94%E7%A9%B6 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
互联网新技术新应用研究
