The main blood test indicators are white blood cells, red blood cells, hemoglobin and platelets, as follows: 1, the normal value of white blood cell count is (4-10) × 10^9 / L, normal conditions during the day and night the value will fluctuate, especially after exercise will be mildly elevated, is the normal physiological changes; 2, the normal range of red blood cell count in men, women and newborns are not the same, men are (4-5.5 ) × 10^12 per L in men, (3.5-5.0) × 10^12 per L in women and (6.0-7.0) × 10^12 per L in newborns; 3. Hemoglobin concentration measurement, the normal range in men, women and newborns is also different, ranging from 120-160 g/L in men, 110-150 g/L in women and 170-200 g/L in newborns. The hemoglobin concentration test result is the main indicator for clinical diagnosis of anemia, and is also one of the routine blood test items in the physical examination. If the hemoglobin concentration is lower than 100g/L, the clinical judgment is mild anemia; lower than 50g/L is severe anemia, which requires blood transfusion treatment; 4, the normal range of platelets is (100-300) × 10^9 / L. Platelets are one of the indicators of good or bad coagulation function in the body. Platelet increase is common in primary thrombocytosis, platelet below 100×10^9 / L, clinically determined as a mild reduction of platelet, when the patient will appear subcutaneous bleeding, such as purple and black small squares of skin, if less than 50×10^9 / L, clinically determined as a severe reduction of platelet, serious internal hemorrhage, the need for timely platelet transfusion Treatment.