患者手足疼痛,肤色紫暗发凉,喜暖恶寒,得温痛减,舌淡暗,脉沉 迟涩,证属:       
A
血寒证
B
血瘀证      
C
气虚血瘀证  
D
气滞血瘀证    
E
凉燥证