string(248) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%AD%A6p%E5%9B%BE%E5%BA%94%E8%AF%A5%E7%94%A8%E4%BB%80%E4%B9%88%E8%BD%AF%E4%BB%B6 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
学p图应该用什么软件
