— Can you guess ______ the MP4 player yesterday?

— Sorry, I've no idea about it.[ ]

A.how much did he pay for

B.how can he get

C.how much he paid for

D.how did he get

患者，男性，51岁，既往体健，车祸致多发伤，急呼120。接诊时见患者意识模糊，面色苍白，血压60/45mmHg，脉搏116次／分，呼吸22次／分，双侧瞳孔等大等圆，对光反射灵敏，头颅无畸形，右颜面部出血红肿，无头皮裂伤，胸廓无畸形，右侧挤压试验阳性，腹部平软，无胃肠型及蠕动波，右上肢及右下肢多处出血伴剧烈疼痛。

若该患者合并有基础心脏疾病，补液时应注意（）

A.先盐后糖

B.先快后慢

C.见尿补钾

D.控制补液速度，不宜过快

E.先晶后胶