單項(xiàng)選擇題9個(gè)月女?huà)?,母乳喂養(yǎng),不規(guī)則加輔食,面色蒼白2個(gè)月,肝、脾未觸及,RBC3.9×10/L,Hb90g/L,MCV68fl,MCH24pg,MCHC0.27,WBC和PLT正常,網(wǎng)織紅細(xì)胞0.010,其最可能的診斷是()

A.營(yíng)養(yǎng)性缺鐵性貧血
B.營(yíng)養(yǎng)性巨幼細(xì)胞貧血
C.地中海貧血
D.肺含鐵血黃素沉著癥
E.鉛中毒