[面积标注](%E9%9D%A2%E7%A7%AF%E6%A0%87%E6%B3%A8.md) [批量求和](%E6%89%B9%E9%87%8F%E6%B1%82%E5%92%8C.md) [批量求差](%E6%89%B9%E9%87%8F%E6%B1%82%E5%B7%AE.md)