string(241) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=app%E6%8E%A8%E5%B9%BF%E6%80%8E%E4%B9%88%E5%81%9A%E6%AF%94%E8%BE%83%E5%A5%BD => Failed to connect to 14.18.117.71 port 38093: Connection refused"
app推广怎么做比较好
