prothrombin activation factor

例句：

1. 1.The patient's prothrombin level was low, which could be a risk factor for blood clots.
   患者的凝血酶原水平低，这可能是血栓形成的风险因素。
2. 2. The doctor prescribed the patient a vitamin supplement to boost his prothrombin levels.
   医生给患者开了维生素补充剂，以提升他的凝血酶原水平。
3. 3.The research team focused on studying the relationship between prothrombin and coagulation factors in patients with hemophilia.
   研究团队专注于研究凝血酶原与凝血因子在血友病患者中的关系。