The young actress looked so charming in her beautiful dress that we took   pictures with her.

A．a great many of

B．a good many

C．the number of

D．a large amount of

患者，女性，31岁。自觉疲倦、乏力、食欲不振近2年。平时月经量多，生育1胎，小孩1岁半，自己哺乳喂养。无其他疾病史。体检：发现皮肤、唇黏膜、甲床苍白，心率100次/分。RBC3.15×10¹²/L，Hb75g/L，MCV69fl，网织红细胞1.8%，白细胞5.3×10⁹/L，血小板120×10¹²/L，尿三胆试验阴性，大便隐血试验阴血。

本病对症治疗后，下列哪项指标对观察疗效最好( )

A．血片观察红细胞形态

B．细胞内铁增加

C．红细胞数量增高

D．骨髓增生明显活跃

E．网织红细胞升高