biopsy of small intestine

例句：

1. 1. The doctor performed a biopsy on the skin lesion to determine its cause.
   医生对皮肤病变进行了活检以确定其原因。
2. 2. During the surgery, the surgeon removed a sample of tissue for analysis.
   在手术中，外科医生取出了一部分组织进行分析。
3. 3. The pathologist examined the biopsy and determined that it was cancerous.
   病理学家检查了活检结果，并确定它是癌症的。