string(267) "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%E7%9A%84%E8%A1%8C%E7%A8%8B%E5%8D%95%E6%80%8E%E4%B9%88%E6%89%93%E5%8D%B0%E7%9A%84 => Failed to connect to 101.89.159.206 port 38075: Connection refused"
机票的行程单怎么打印的
