Which of the following characteristics of aspirin analgesic effect is/are CORRECT?
选项：

A: It’s the most effective in reducing pain of mild to moderate intensity especially chronic dull pain
B: It acts peripherally through its effects on inflammation but probably also inhibits pain stimuli at a subcortical site
C: Analgesic effects are produced without tolerance and dependence
D: It isn’t effective for sharp pain caused by trauma and visceral colic