prophylactic treatment

例句：

1. 1. The doctor prescribed a prophylactic vaccine to protect against the flu.
   医生开了一种预防性的疫苗来预防流感。
2. 2.The research team focused on developing prophylactic treatments for cancer patients.
   研究团队专注于为癌症患者开发预防性治疗。
3. 3.Prophylactics are often used in conjunction with other treatments to prevent illnesses before they occur.
   预防措施通常与其他治疗方法结合使用，以防止疾病发生。