use hands to wrestle out of a thumb prick

fuel injected engine gives the vehicle a boost

Dr. Fu puts a needle into your body part. There is only a drop of blood.

A Ph.D., knowledgeable in blood test research and its thumb prick methods, invented a new needle.

as a component: “十字旁” or “十字头”

A thumb prick is an injection into the thumb.

a surgical staple gun

A liter is a thousand mL. Picture a liter bottle full of needles.

Every day at noon, you must lie down and give yourself a shot with a needle.

“What in the world is going on here?” (when you see your persona with a needle).