You set the fracture, you drew the blood, you spun the blood, looked at it under the microscope, you plated the culture, you injected the antiserum.

以处理骨折，以抽血以验血，以用显微镜观察，以织切片，以注射抗血清。

You might have a lobar pneumonia, for example, and they could give you an antiserum, an injection of rabid antibodies to the bacterium streptococcus, if the intern sub-typed it correctly.

比如说，有叶性肺炎，医生以对进行抗血清治疗，为注射狂犬病抗体以此对抗链球菌，前提是实习医生分类正确。