阅读短文, 选择答案。

     I am a number (数字).  I have (有) four letters (字母).  My first (第一) letter is in "four" ,but not in

"your".  My second (第二) letter is in "in", but not in "on".  My third  (第三) letter is in “vest", but not in

"test". The last letter is between "d" and "f".  Who am I? 

1. How many letters does the number have (有)?         

A. 5        

B. 3        

C. 4

2. The first letter is           .          

A. f        

B. o        

C. y

3. The third letter is           .         

A. e        

B. s        

C. v

4. The number is           .         

A. four      

B. five      

C. ten

贫血患者，咳嗽、痰中带血半年，痰中查见抗酸杆菌，实验室检查：HGB78g／L，白细胞、血小板正常，血清铁5．78μmol／L，骨髓铁粒幼细胞减少，外铁增加。治疗错误的是（）

A.抗结核治疗

B.抗感染治疗

C.EPO

D.肌注右旋糖酐铁

E.补充维生素