string(269) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2022%E5%B9%B4%E4%BA%8C%E5%BB%BA%E7%9A%84%E4%B9%A6%E6%9C%89%E4%BB%80%E4%B9%88%E5%8F%98%E5%8A%A8%E5%90%97 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
2022年二建的书有什么变动吗
