string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8F%AF%E4%BB%A5%E6%8C%A3%E6%B5%81%E9%87%8F%E7%9A%84%E8%BD%AF%E4%BB%B6 => Failed to connect to 101.89.117.144 port 38076: Connection refused"
可以挣流量的软件
