string(250) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%B1%B1%E4%B8%9C400%E5%A4%9A%E5%88%86%E4%B8%8A%E4%BB%80%E4%B9%88%E5%A4%A7%E5%AD%A6 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
山东400多分上什么大学
