string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E4%BC%9A%E8%80%83%E8%AF%95%E5%A4%A7%E7%BA%B2%E5%8F%98%E5%8C%96 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
注会考试大纲变化
