string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%AD%A6%E6%A0%A1%E9%94%99%E5%B3%B0%E5%B0%B1%E9%A4%90%E7%9A%84%E5%A5%BD%E5%8A%9E%E6%B3%95 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
学校错峰就餐的好办法
