The significance of the indicators of blood routine are: a. the number of white blood cells, the normal range of white blood cells in the peripheral blood of adults is 4000-10000/ml, lower than 4000/ml is white blood cell reduction, higher than 10,000/ml is white blood cell increase. There are also the respective ratios of neutrophils, lymphocytes, monocytes, eosinophils and basophils, which are higher or lower than the normal range are abnormal. Red blood cells, including the number of red blood cells, the normal range is 4-5.5 million/ml for adult males and 3.5-5 million/ml for adult females, below the normal range is the decrease in red blood cells, which is common in various types of anemia; above the normal range is the increase in red blood cells, which is seen in various long-term hypoxic diseases. Third, the number of platelets, the number of normal human platelets is 10-30 million/ml, higher than 300,000/ml is platelet increase, lower than 100,000/ml is platelet reduction. The lower the number of platelets, the more obvious the bleeding symptoms are.