具备下列哪几项条件可确诊轻型胰腺炎（）。

A.排除其他急腹症

B.血清淀粉酶升高

C.腹部压痛，但无腹肌紧张和反跳痛

D.尿淀粉酶升高

E.剧烈持续的上腹部疼痛，伴恶心呕吐，轻度发热

It took a great deal of courage to admit that all his efforts had been________.[ ]

A. in danger        

B. in turn

C. in return  

D. in vain