string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%82%A3%E4%B8%AA%E5%BF%AB%E9%80%92%E8%B4%B9%E7%9B%B8%E5%AF%B9%E4%BE%BF%E5%AE%9C%E7%82%B9 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
那个快递费相对便宜点
