string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%9C%BA%E7%A5%A8%E9%A2%84%E8%AE%A2%E5%8D%95%E6%80%8E%E4%B9%88%E5%86%99 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
机票预订单怎么写
