string(283) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BD%91%E4%B8%8A%E4%BB%B7%E6%A0%BC%E5%92%8C%E5%AE%9E%E4%BD%93%E5%BA%97%E4%BB%B7%E6%A0%BC%E5%B7%AE%E5%A4%AA%E5%A4%9A => Failed to connect to 14.18.117.71 port 38133: Connection refused"
网上价格和实体店价格差太多
