string(267) "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%E7%9C%8B%E4%B9%A6%E8%BF%98%E6%98%AF%E7%9C%8B%E8%AE%B2%E4%B9%89 => Failed to connect to 101.89.159.206 port 38087: Connection refused"
二建市政看书还是看讲义
