string(273) "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%E5%BA%94%E8%AF%95%E6%8C%87%E5%AF%BC%E5%92%8C%E6%95%99%E6%9D%90%E7%9A%84%E5%8C%BA%E5%88%AB => Failed to connect to 14.18.46.51 port 38044: Connection refused"
注会应试指导和教材的区别
