—Thanks so much for everything. You have certainly made my stay very pleasant.

—________.[ ]

A. It's my duty

B. I'm with you on that

C. It's my pleasure

D. It's nice to say so

急性胰腺炎时，有关淀粉酶变化的临床意义，下列错误的是（）。

A.血淀粉酶在1～2小时开始升高，24小时达高峰，4～5天逐渐降至正常

B.尿淀粉酶在24小时才开始升高，48～72小时达高峰，1～2周恢复正常

C.尿淀粉酶测定值≥200U/dl（索氏单位）有诊断意义

D.淀粉酶升高的幅度与病变的严重程度不呈正相关

E.腹腔穿刺液，测得淀粉酶值对诊断很有帮助