The doctor looked at his patient’stongue,felt of his pulse(脉搏),knocked onhis chest,and began:“Same old story,myfriend.Too much confinement(闭门不出).Don’t deny it.What you need is plenty ofoutdoor exercise.Walk,walk,walk.”“But,doctor—”“Don’t argue with me.I am the doctor.Take my advice.Walk ten times as much as