biopsy of nasopharynx

例句：

1. 1. The doctor performed a biopsy on the mole to check for cancer.
   医生对痣进行了活检以检查是否癌症。
2. 2. The patient underwent a biopsy to confirm the diagnosis.
   患者接受了活检以确认诊断。
3. 3. The pathologist performed a biopsy to study the tissue sample.
   病理学家进行了活检以研究组织样本。