string(270) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%89%8B%E6%9C%BAapp%E5%BC%80%E5%8F%91%E4%B8%80%E4%B8%AA%E5%A4%9A%E5%B0%91%E9%92%B1%E5%90%88%E9%80%82 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
手机app开发一个多少钱合适
