Administrative closure should not be delayed until project completion because （）.

A．useful information may be lost

B．the project manager may be reassigned

C．project team members may be reassigned by that time

D．sellers are anxious for payments

治疗食管静脉曲张破裂出血，以下哪项措施最有效（）

A.安络血肌肉注射

B.维生素K静脉注射

C.静脉应用垂体后叶素

D.冰盐水+去甲肾上腺素洗胃

E.三腔管气囊压迫