It was his studying in No.2 High School of Baoding for three years ____ laid the foundation of his

successful career.[ ]

A. that

B. when

C. since

D. until

女性，45岁，贫血1年。肝肋下刚可触及，脾未触及。血红蛋白60g/L，红细胞2.10×10⁹/L，白细胞3.2×10⁹/L，中性粒细胞38%，淋巴细胞62%，未见幼红细胞，血小板50×10⁹/L。骨髓巨核细胞全片可见1个，中性粒细胞碱性磷酸酶积分增高，骨髓增生活跃，粒系统及红系统多为晚期阶段，Ham试验阴性。

治疗上应首选哪一项措施( )

A．肾上腺皮质激素

B．骨髓移植

C．输洗涤红细胞

D．脾切除

E．雄性激素配合中医中药