Her refusal of fast food是名词短语作主语，相当于动名词复合结构 Her resusing fast food或名词性从句 That she refuses fast food 。又如：

His arrival at the funeral made them very surprised.

His arriving at the funeral made them very surprised.

That he arrived at the funeral made them very surprised.

Her refusal of fast food：名词词组表达“主动宾”意义。

Her（主） refusal（动）of fast food（宾），可以扩展为一个完整的句子：

He refuses fast food.

又如：

Your waste of time is a bad thing.

You waste time.

The girl's description of the event is vivid.

The girl describes the event.

His study of a foreign language lasted five years.

He studied a foreign language.

换成句子只是为了理解句意，但不能用来替换划线部分。这说明：of 介词短语可以表示“动宾关系”。

被of介词短语修饰的名词具有动词性质（一般是由动词变来的名词），该名词与of 后面的名词，存在动宾关系。而名词前的物主代词或名词所有格，是这个名词所表动作的施事者（主语）。

Her refusal of fast food is due to her healthy eating habits. 她对快餐食品的拒绝是因为她健康的饮食习惯。  请问老师这样翻译对吗？ refusal of 这种 名词+of 是什么语法知识呢？谢谢老师

    【答】名词 refusal 后面可以接 “of + 名词“ 或者 动词不定式，不能接“of + 动名词“ 和动名词。如：

      They couldn't understand her refusal of a scholarship to Yale. 他们无法理解她为什么拒绝耶鲁大学的奖学金。（摘自《朗文当代高级英语辞典》第6版英英英汉双解版p.2152）

      His refusal to pay the fine got him into even more trouble. 他拒付罚金，这下麻烦更大了。（同上）

     refusal  of  ... 和 refusal to  ... 的意思都是“对 ...... 的拒绝”, 其中的  of  是介词，后面接名词或代词，不能接动名词； to  是动词不定式符号，后接动词原形。