1、The doctor performed an anoscope examination to investigate the cause of the patient's rectal bleeding.
医生进行了肛门镜检查，以调查患者直肠出血的原因。
2、An anoscope is a medical instrument used to examine the inside of the anus and lower rectum.
肛镜是一种用于检查肛门和下直肠内部的医疗器械。