Safety and Efficacy of Anricfen for Postoperative Analgesia and Rehabilitation Promotion After Pancreaticoduodenectomy.Intervention Measures: For Normal Adults, Administer Ariceptin Injection Intravenously Post-operation at a Dose of 1 μg/Kgevery 8 Hours for Three Consecutive Days After Surgery.

Inclusion Criteria: * Patients who underwent pancreatic surgery, including pancreaticoduodenectomy (PD), pancreatic-preserving pancreaticoduodenectomy (PPPD), and laparoscopic pancreaticoduodenectomy (LPD) * Age ≥ 18 years old and \< 80 years old * ASA Ⅰ-Ⅲ * Be able to clearly understand and voluntarily participate in the research Exclusion Criteria: * Merging severe primary diseases involving the heart, brain, liver, kidneys and hematopoietic system * History of long-term use of psychotropic drugs and cognitive dysfunction * Having a history of acute poisoning from alcohol, sleeping pills, painkillers or other drugs that affect the central nervous system * Pregnancy or lactation period * History of allergy to NSAIDs, opioids, or to the test medication * Drug users, alcoholics, and opiate abusers * Those who had a history of chronic pain before the operation and a history of long-term use of analgesics and/or sedatives * Those who had thyroid dysfunction before the operation