严重挤压伤者，当伤肢局部明显肿胀，伴有静脉回流障碍时，局部处理应首先考虑（）

A.切开减压

B.患肢制动

C.患肢抬高

D.理疗

E.活血化瘀、抗凝

He was driving so fast as to get himself into a dangerous situation _____ he is likely to lose control over

his ear.[ ]

A. where        

B. how        

C. why              

D. which