ICU
noun [ C ] medical specialized uk/ˌaɪ.siːˈjuː/ us/ˈaɪˌsiːˈjuː/
加护病房（intensive care unit的缩写）
abbreviation for intensive care unit: the part of a hospital the provides continuous treatment for patients who are seriously ill, very badly injured, or who have just had an operation
ICU beds are a very expensive and limited resource. 加护病房的床位昂贵而且数量很少。