Erythrocytes 3.89 x 10^12/L are low in males, hemoglobin 87g/L is low in both sexes, and platelets 389 x 10^9/L are high. 1. Erythrocytes and hemoglobin in human blood are often used to respond to the body’s ability to produce red blood cells and to assist in the diagnosis of red blood cell-related diseases. The reference range of red blood cell count for adult male is (4.0~5.5)×10^12/L and hemoglobin is 120~160g/L; the reference range of red blood cell count for adult female is (3.5~5.0)×10^12/L and hemoglobin is 110~150g/L. Therefore, if the red blood cell count of a male is 3.89×10^9/L, then the reference range of red blood cell count of an adult female is (3.5~5.0)×10^12/L and the reference range of hemoglobin is 110~150g/L. Therefore, if the red blood cells of men are 3.89×10^12/L, they are low, while women are normal; if the hemoglobin index of men and women is 87g/L, they are both low and abnormal. Low erythrocyte and hemoglobin indexes can be seen in iron deficiency anemia, megaloblastic anemia, aplastic anemia, acute leukemia and so on. 2. The normal reference value of platelet is (100~300)×10^9/L. Therefore, platelet 389×10^9/L is high, which is commonly seen in hemoconcentration, increased reactivity, and primary thrombocythemia. When blood routine values are abnormal, the cause should be clarified under the guidance of a doctor so that treatment can be actively carried out.