Different Intraoperative Blood Pressure Management on Postoperative Cognitive Function in Tumor Patients（PRECISION）

Inclusion Criteria: 1. Patients with high-risk stroke (combined with 3 risk factors or more according to the stroke risk screening table) 2. Patients who plan to undergo surgery for abdominal tumors (gynecological, urinary, hepatobiliary, and gastrointestinal tumors) under general anesthesia are expected to have surgery duration \>2 hours 3. The ASA is rated as Class II or III 4. Patients who underwent invasive arterial blood pressure monitoring before surgery signed informed consent Exclusion Criteria: 1. Patients do not want to participate in the study 2. Patients with severe heart disease (severe valvular disease, sick sinus syndrome, high atrioventricular block without pacemaker implantation), grade III or above Liver function impairment (Child-Pugh class C) 3. Need kidney replacement therapy; New stroke \<3 months 4. Emergency surgery 5. Preoperative history of mental illness, epilepsy, Parkinson's disease, or myasthenia gravis 6. Speech, vision, or hearing impairment that prevents completion of a cognitive function assessment 7. Situations where strict blood pressure management is not appropriate, such as controlled hypotension during surgery.