—Which of those electronic dictionaries do you like most?

— _____. They are both expensive and of little use.[    ]

A. Both

B. None

C. Neither

D. All

十二指肠后壁溃疡大出血，如果病人条件允许，最好的术式为（）

A.高选择性迷走神经切断术

B.包括溃疡在内的胃大部分切除术

C.贯穿缝扎出血动脉主干

D.单纯缝扎出血点

E.结扎出血点加胃大部分切除术