— Dad, can we go to the shop?I want to buy some sweets.

— _______.Can't you see I'm busy at the moment?[ ]

A. Take it easy        

B. No problem      

C. Forget it          

D. Don't mention it

缩窄性心包炎最有特异性的体征是

A．奇脉
B．颈静脉怒张
C．心包叩击音
D．肝大
E．水肿