單項選擇題某女,月經周期為20~40天,經量或多或少,色紫紅有塊,經行不暢,經前乳房脹痛,噯氣食少,舌苔薄白,脈弦。其治法是()

A.疏肝理氣調經
B.疏肝活血化瘀
C.補腎調經
D.補腎疏肝
E.補腎活血