患者脘腹冷痛，痛势急暴，遇寒加剧，得温则减，恶心呕吐，吐后痛缓，苔白润，脉沉紧，宜诊为

A.脾阳虚证

B.胃阳虚证

C.寒湿困脾证

D.寒滞胃肠证

E.饮留胃肠证