患儿，8个月。单纯母乳喂养。患儿中度贫血，乏困、无力，诊断为营养性巨幼红细胞性贫血。健康教育时，告知家长发病的主要原因是（）。

A.铁摄入不足

B.铁需要量增多

C.维生素C摄入不足

D.维生素B₁₂及时酸供给不足

E.葡萄糖-6-磷酸脱氢酶缺乏

Directions.

A. Study the following picture carefully and write an essay in no less than 160-200 words.

B. Your essay must be written clearly on ANSWER SHEET 2.

C. Your essay should meet the requirements below:

1) Interpret the following picture,

2) analyze possible reasons for this situation, and

3) suggest counter-measures.