string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%94%B9%E7%AD%BE%E7%9A%84%E7%A5%A8%E4%B8%BA%E4%BB%80%E4%B9%88%E8%A6%81%E4%BB%98%E5%85%A8%E9%A2%9D => Failed to connect to 101.89.159.206 port 38100: Connection refused"
改签的票为什么要付全额
