— Mike, I can't stop playing computer games.

— For your eyes, my dear friend, I'm afraid you            . [ ]

A. have to

B. may

C. must

D. need

下面哪些检测方法有助于菌痢的早期诊断（）

A.大便涂片直接找痢疾杆菌

B.志贺菌抗原的免疫学检测

C.志贺菌核酸检测

D.大便培养检出志贺菌

E.大便镜检可见满视野红、白细胞