— “ The music is too loud. Could you please turn down the radio a bit?”

— __________________

A．Sorry. I didn’t know you were reading.

B．Thank you. It’s very kind of you.

C．Don’t trouble. I like music.

D．Oh, it’s an honor for me to do so.

女性，52岁。3个月来在休息或劳累后于心前区有憋闷感，含硝酸甘油20分钟缓解。有高血压病史十余年。实验室检查：空腹血糖5mmol/dl，胆固醇5.5mmol／dl，HDL-C2.0mmol／dl，LDL-C2.5mmol/dl。

能帮助确定是否为冠心病心绞痛的最有价值的检查方法是（）

A.心电图

B.Holter（动态心电图）

C.超声心动图

D.心电图运动负荷试验

E.冠状动脉造影