Injected a needle into the arm.

Injected with a shot of cardiotonic. There is no next sentence.

A shot in the arm means: adding the necessary conditions for stability to the situation or mentality. From Clinical Medical Practice.

The meaning of cardiotonic is as follows: ① Philosophically, it refers to the objective reality that can be reflected by consciousness without relying on consciousness. The generalization of the * * * attribute of all perceptual things is different from all kinds of real, specific and concrete material forms (such as atoms and gases). ). Motion is the fundamental attribute of matter, and the world is an infinite collection of matter that moves forever. Matter is infinite in space and eternal in time. It can neither be created nor destroyed. Consciousness is the product of high material development. The concrete forms and structures of matter are constantly changing and developing. (2) means of subsistence, money, etc.