-What are you doing?

-I          in bed.   [ ]

A. am staying    

B. am stay

C. are staying    

D. is staying

治疗粘连性单纯性肠梗阻，最主要的措施是

A．抗生素

B．解痉药

C．胃肠减压，纠正水、电解质、酸碱失衡

D．行肠切除手术

E．急症手术