string(270) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%81%9A%E4%B8%80%E6%AC%BE%E7%AE%80%E5%8D%95%E7%9A%84app%E9%9C%80%E8%A6%81%E5%A4%9A%E5%B0%91%E9%92%B1 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
做一款简单的app需要多少钱
