string(235) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E4%BA%8C%E5%BB%BA%E6%B3%95%E8%A7%84%E8%93%9D%E5%AE%9D%E4%B9%A6 => Failed to connect to 101.89.117.144 port 38017: Connection refused"
2021二建法规蓝宝书
