string(261) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A4%96%E5%8D%96o2o%E5%B9%B3%E5%8F%B0%E7%9B%88%E5%88%A9%E6%A8%A1%E5%BC%8F%E5%88%86%E6%9E%90 => Failed to connect to 101.89.159.206 port 38100: Connection refused"
外卖o2o平台盈利模式分析
