一患者因大吐血而出现体虚欲脱，大汗淋漓，脉微欲绝的症状。若患者伴有脘痞闷，恶心呕吐，纳呆苔腻，宜配伍的药物是：（）

A.厚朴

B.苍术

C.白豆蔻

D.肉豆蔻

E.砂仁

At all angles of inclination, the metacenter is（）.

A.vertically above the center of buoyancy

B.vertically above the center of gravity

C.at the intersection of the upright vertical centerline and the line of action of the buoyant force

D.at the geometric center of the underwater volume