A 6 yo Asian girl came to ER with "squeezing" headache. Her BP: 129/78. CBC: WBC 11k/ul, Hb 20.3, Hct 60.5%, RBC 7.8m/ul, MCV 79, MCH 26.7, MCHC 33.8, RDW 15. Her father has red blood cell disorder and undergoes phlebotomy once in two months. The following is her peripheral blood smear.