说明：  CAD数字求和、面积标注、批量打印、统计块数量，都是干货，cad2006或更高版本。使用方法：点击 autocad 菜单 “工具” “加载应用程序”（或者在命令栏输入appload指令） ，加载 xxx.lsp
(CAD digital summation, area marking, batch printing, and counting the number of blocks are all dry goods, cad2006 or higher. Usage: click "tools" and "load application" in AutoCAD menu (or input appload command in command bar), load xxx.lsp)