病人在接受切除肿瘤的手术后恢复良好。

The patient is recovering well after ___surgery to remove the tumor.

随着现代技术的应用，心脏手术已经变得安全得多。

Heart ___surgery has become much safer with modern techniques.

我父亲下周将接受膝盖手术。

My father will undergo ___surgery on his knee next week.