string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=21%E5%B9%B4%E4%BA%8C%E5%BB%BA%E6%B3%95%E8%A7%84%E9%9A%BE%E4%B8%8D%E9%9A%BE => Failed to connect to 14.18.117.71 port 38093: Connection refused"
21年二建法规难不难
