单项选择题
It is employed in the treatment of Pain in the chest,stomach,and abdomen,injuries due to impact,fractures,contusions and Strains,Pain due to blood stasis,dysmenorrhea;and Postpartum abdominal pain．According to the above,what does the drug treat（）
A．牙痛
B．头痛
C．产后腹痛
D．腰背痛
E．关节疼痛