A . proliferative phase of endometrium：发生在月经后半期甚至月经期
B . simple hyperplasia of endometrium：腺体增生伴有轻至中度结构异常
C . complex hyperplasia of endometrium：腺上皮呈复层或假复层排列，有核分裂
D . atrophic endometrium：腺上皮为单层立方或低柱状细胞
E . atypical hyperplasia of endometrium见于功血的复杂型增生过长
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