string(257) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%8C%E5%BB%BA%E5%B8%82%E6%94%BF%E6%A1%88%E4%BE%8B%E7%AD%94%E9%A2%98%E6%80%9D%E8%B7%AF => Failed to connect to 101.91.112.32 port 38195: Connection refused"
二建市政案例答题思路
