The main function of health risk assessment: (1) helps individuals to fully understand health risk factors, including inducing factors that exist inside and outside the body to increase the probability of disease occurrence and death, so option E is correct. (2) Encourage and help people to correct unhealthy behaviors. Through personalized and quantitative evaluation results, health risk assessment helps individuals to understand their own health risk factors and their hazards and development trends, and points out the direction that individuals should strive to improve, which is conducive to doctors to formulate targeted systematic education programs and help people correct unhealthy behaviors. Therefore, option A is correct. (3) A detailed analysis of the health risk assessment results is conducive to formulating effective and cost-saving health intervention measures, so option D is correct. (4) Evaluate the effectiveness of intervention measures. (5) Classify the health management population according to the evaluation results. There are two main classification criteria: health risk level and medical expenses level, so option C is correct. (6) Health risk assessment can also meet other purposes. For example, the evaluation data is widely used in insurance underwriting and service management, and calculating the health insurance rate according to the evaluation data to make the premium collection more reasonable is a typical example. In addition, linking health assessment data with health expenditure can also predict health insurance costs and help insurance companies quantify the return effect.