veins of brainstem

例句：

1. 1. The MRI scan revealeda vein in the brainstem.
   磁共振成像扫描显示了脑干中的一条静脉。
2. 2. The patient's condition worsenedafter receiving treatment for the vein in thebrainstem.
   患者在接受治疗脑干静脉后病情恶化。
3. 3. The doctor advised thepatient to avoid activities that could strain thevein in the brainstem.
   医生建议患者避免可能导致脑干静脉受伤的活动。