string(242) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=21%E5%B9%B4%E5%B8%82%E6%94%BF%E4%B8%80%E5%BB%BA%E7%AC%AC%E4%B8%80%E9%A2%98 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
21年市政一建第一题
