1, OneBook is the most basic version, suitable for beginners or people interested in the basic knowledge of geometry. It contains the basic concepts, formulas and theorems of geometry, and provides simple examples and exercises.

2. This edition of 3DGeometry mainly focuses on 3D geometry, which is suitable for people who are interested in space geometry. It contains the basic concepts, formulas and theorems of 3D geometry, and provides related examples and exercises to help readers understand and apply 3D geometry knowledge.