病例介绍:患者,男,64岁,已婚,因“下腹疼痛2天,加重9小时”入院。患者于2天前无明显诱因出现整个下腹隐痛,呈持续性隐痛,可以忍受,无阵发性加重。无畏寒、发热、咳嗽、咳痰,无恶心呕吐,无返酸、嗳气,无尿频、尿急、尿痛及血尿,无腹泻及黑便。未做检查及治疗。9小时前疼痛加重,? Case presentation: The patient, male, 64 years old, is married and admitted to hospital because of “two days of lower abdominal pain and an increase of 9 hours.” The patient had no obvious cause of pain in the entire lower abdomen 2 days before. He had persistent persistent pain and could tolerate without paroxysmal aggravation. No chills, fever, cough, sputum, no nausea and vomiting, no acid, belching, no urinary frequency, urgency, dysuria, and hematuria, and no diarrhea or melena. Not checked and treated. 9 hours ago, the pain worsened?