男性，67岁，饮酒后上腹痛12小时，伴腹胀，恶心、呕吐。查体：上腹正中压痛(+)，无反跳痛。既往有胆囊结石病史。

对该患者确诊最有帮助的检查是

A．心电图

B．血淀粉酶

C．尿常规

D．X线腹平片

E．血白细胞计数

—You haven't been to Beijing, have you
—______. And how I wish to go there again!

A．Yes, I have


B．Yes, I haven't
C．No, I have


D．No, I haven't