string(244) "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%E6%95%99%E6%9D%902024%E5%AE%98%E6%96%B9%E6%AD%A3%E7%89%88 => Failed to connect to 101.89.117.144 port 38005: Connection refused"
二建教材2024官方正版
