regard as的意思是“将...视为;认为...”,强调的是一种主观认识,请看下面例句:I regard your suggestion as worth considering. 我觉得你的建议值得考虑. We regard your action as a crime. 我们认为你这种行为是犯罪行为. treat as 也有“把某事物看作; 视某事物为”的意思,但强调的是一种动作:I decided to treat his remark as a joke. 我把他的话当作玩笑话