9个月女婴,母乳喂养,不规则加辅食,面色苍白2个月,肝、脾未触及,RBC3. 9 × 10^12/L,Hb90g/L,MCV 68fL,MCH 24pg,MCHC 0. 27,WBC和PLT正常,网织红细胞0. 01, 其最可能的诊断是
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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