女性，18岁。月经量多，逐渐面色苍白，乏力，HGB70g/L，部分红细胞大小不等，中心淡染；骨髓铁粒幼细胞减少。

最佳的治疗方案是（）

A.维生素B12+铁剂

B.输新鲜血

C.叶酸+铁剂

D.维生素B12+铁剂

E.维生素C+铁剂

汉译英：“承兑交单；付款交单；货到即付”，正确的翻译为：（）

A．document against acceptance; document against payment; payment against arrival

B．document against payment; document against acceptance; payment against arrival

C．document against acceptance; payment against arrival; document against payment

D．payment against arrival; document against payment; document against acceptance