石瘿的病机主要是（）

A.情志内伤

B.冲任失调

C.肝郁胃热

D.肝脾气逆

E.风温侵肺

Daily exercise makes you feel good. It helps you think better and believe it or not, it helps you sleep better and feel more relaxed. Once you start exercising regularly, you will feel per and keep improving at physical activities. When you exercise, you breathe more deeply and get more oxygen into your lungs with each breath. Your heart pumps more oxygen-filled blood to all parts of your body with each beat. Your muscles and joints feel flexible. Exercise also helps you to stay at a healthy weight.