I have _____ all my papers but I still can't find my notes. [ ]

A. looked through

B. looked for

C. looked after

D. looked out

决定输血治疗前，经治医师应向患者或其家属说明什么（）

A.血液传播性疾病的治疗

B.输同种异体血的不良反应和经血传播疾病的可能性

C.疾病与血型的关系

D.血液传播性疾病的症状

E.血液的采集与保存