ouroscopy

例句：

1. 1. During the surgery, the doctor used an endoscope to examine the inside of the patient's stomach.
   手术期间，医生使用内窥镜检查了病人胃的内部。
2. 2. The endoscope was inserted through the patient's mouth and guided the doctor's hand into the throat.
   内窥镜通过病人的口腔插入，引导医生的手进入喉咙。
3. 3. The endoscope revealed a tumor growing in the patient's esophagus.
   内窥镜显示患者食管中生长了一个肿瘤。