avoiding things that give pleasure but may be bad for you, for example eating too much or drinking alcohol

Smith celebrated abstemiously with two of his closest friends. 史密斯不铺张地和两个最亲近的朋友庆祝了一下。

He performed his duties assiduously and lived abstemiously. 他兢兢业业地做好本职工作，但生活得非常节制。