string(261) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8D%8E%E4%B8%9C%E7%90%86%E5%B7%A5%E5%9C%A8211%E9%87%8C%E4%BB%80%E4%B9%88%E6%B0%B4%E5%B9%B3 => Failed to connect to 101.89.117.144 port 38017: Connection refused"
华东理工在211里什么水平
