string(244) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E5%B9%B4%E4%BA%8C%E5%BB%BA%E6%B3%95%E8%A7%84%E9%9A%BE%E5%BA%A6%E5%A4%A7 => Failed to connect to 101.89.143.195 port 38109: Connection refused"
2021年二建法规难度大
