静脉点滴：IV drip= intervenous drip infusion
静脉注射：IV= intravenous injection
肌肉注射：IM= intramuscular injection
还有个说法叫intraveneous therapy—Intravenous therapy (abbreviated as IV therapy) is a medical technique that delivers fluids, medications and nutrition directly into a person’s vein. 详见维基百科 https://en.wikipedia.org/wiki/Intravenous_therapy