string(258) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%A1%BA%E4%B8%B0%E7%89%B9%E5%BF%AB%E6%AF%94%E6%A0%87%E5%BF%AB%E5%BF%AB%E5%A4%9A%E5%B0%91 => Failed to connect to 125.88.227.171 port 38114: Connection refused"
顺丰特快比标快快多少
