一位医生的手举起注射器，按下活塞，挤出一点液体。药物从医疗注射器末端的针头射出。

r's hand holds the syringe up and pushes the plunger to get out just a little bit of liquid. The liquid shoots out of the needle at the end of the medical syringe. This process prevents embolisms by removing air from the syringe before injecting medicine or vaccines into the bloodstream.

光厂(VJshi)视频提供一位医生的手举起注射器，按下活塞，挤出一点液体。药物从医疗注射器末端的针头射出。视频素材下载，适用于女护士，轻弹，药，医学注射剂，医疗流程等主题的内容创作。

作者署名：Alexander Piragis/Getty Images/华夏视觉