gastroscopic observation

例句：

1. 1. The doctor performed a gastroscopic observation to diagnose the patient's condition.
   医生进行了一次胃镜检查来诊断病人的状况。
2. 2. During the procedure, the gastroscopic observation revealed several abnormalities in the patient's stomach.
   在手术过程中，胃镜检查揭示了患者胃中的几个异常情况。
3. 3. The gastroscopic observation helped doctors to identify the cause of the patient's chronic digestive issues.
   这次胃镜检查帮助医生确定了患者慢性消化问题的原因。