Screening for stroke primarily targets high-risk groups, conducting relevant examinations to identify individuals at high risk of stroke and provide timely preventive treatment to prevent the formation of cerebral thrombosis. For example, stroke screening requires thorough checks of blood sugar, blood lipids, and homocysteine levels. It is also necessary to measure the patient's blood pressure and assess the condition of the patient’s blood vessels. This includes carrying out ultrasound scans of the bilateral common carotid, internal carotid, and vertebral arteries, as well as transcranial Doppler or cranial MRA examinations. If a patient exhibits significant cerebral arteriosclerosis with arterial narrowing, they are considered part of a high-risk group and must undergo appropriate interventional treatments.