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我时常蹲在地上观察一些小昆虫,但我每次站起来时都会觉得头晕,这是怎么回事呢? A:其实这是每一个人都会遇到的正常现象。人蹲着的时候,腹部受到挤压,下肢
I often squat on the ground to observe some small insects, but I feel dizzy every time I stand up. What is going on? A: Actually, this is a normal phenomenon that everyone will encounter. When squatting, the abdomen is squeezed, lower limbs