string(253) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E4%B8%80%E7%BA%A7%E5%BB%BA%E9%80%A0%E5%B8%88%E6%B3%95%E8%A7%84%E5%8F%98%E5%8C%96 => Failed to connect to 101.89.117.144 port 38076: Connection refused"
2021一级建造师法规变化
