string(240) "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%E7%9A%84%E8%BF%90%E7%94%A8 => Failed to connect to 101.89.159.206 port 38087: Connection refused"
互联网技术的运用
