单选题 11.某患者的血常规结果如下所示：WBC 50×10⁹/L，Hb 105g/L，PLT 100×10⁹/L，外周血涂片结果：myeloblast 2％，promyelocyte 5％，myelocyte 10％，metamyelocyte 20％，basophi l5％，band及segments 38％，monocyte 2％，lymphocyte 3％，该患者最可能的诊断是