A body microscope is used for three-dimensional inspection and observation of electronic components, integrated circuit boards, rotary cutting tools, magnets, etc. How to adapt to these different requirements based on the need to observe objects at different multiples? It can be solved through multiple aspects. a. It can be achieved through optical performance. b. It can be selected for video observation. c. It can be achieved through mechanical performance. d. It can be illuminated through a light source