string(232) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A4%96%E5%8D%96%E5%B1%9E%E4%BA%8Eo2o%E6%A8%A1%E5%BC%8F%E5%90%97 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
外卖属于o2o模式吗
