The nurse is planning care for a 10-year-old child in the acute phase of rheumatic fever. Which activity would be most appropriate for the nurse to schedule in the care plan

A. Playing ping-pong.
B. Reading books.
C. Climbing on play equipment in the playroom.
D. Unrestricted ambulation.

冠心病患者出现心前区收缩期喀喇音及收缩晚期吹风样杂音，是由于（）

A.心力衰竭

B.二尖瓣脱垂

C.二尖瓣相对性关闭不全

D.室间隔穿孔

E.心肌硬化