1.The incidence of cerebral infarction is 80% lower in people who choose good habits than other people; good habits include: quitting smoking, low-fat diet, eating more fruits and vegetables, moderate alcohol consumption, regular exercise, and maintaining normal weight. The better the habits, the more benefits. 2. Emergency physicians quickly identify people at high risk for stroke, give appropriate instructions, implement screening, and begin preventive measures. 3. Although genetic screening in the general population is not currently recommended, it is still relevant in some special cases like having a family history. 4. The comparison of carotid stenting and carotid endarterectomy in terms of effectiveness in the treatment of carotid stenosis remains inconclusive for the time being; in view of the advances in preventive and pharmacological treatments (including changes in lifestyle habits, control of hypertension, control of hyperlipidemia, antiplatelet, etc.), the interventional treatment (intervention, surgery) for asymptomatic carotid stenosis also remains inconclusive. Physicians have to choose specific treatment strategies according to the principle of individualization. 5. Screening for carotid stenosis is not recommended in the general population. 6. Aspirin is not used as a first-line preventive drug in low-risk groups, diabetic patients, and patients with asymptomatic peripheral vascular disease, unless, the weight of stroke occurrence is higher than the risk of bleeding due to aspirin.