string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%BD%AF%E4%BB%B6%E5%BC%80%E5%8F%91%E6%80%8E%E4%B9%88%E5%BC%80%E5%8F%91%E7%9A%84 => Failed to connect to 101.89.159.206 port 38087: Connection refused"
软件开发怎么开发的
