7. 子宮內膜切片顯示,複雜性內膜增生卻無細胞變異時(complex hyperplasia without atypia)適當之治療為:(A)觀察(observation)(B)子宮腔鏡(Hysteroscopy)(C)黃體素(Progestin therapy)(D)雌激素(Estrogen therapy)