with knife and fork为何没冠词

Do all westerners eat with knife and fork?

请问句中的 with knife and fork 为何没冠词？

依据英语习惯，某些成双成对的名词短语一般可以省略冠词，网友的句子就是这样的情况。其实加上冠词也是可以的：

Do all westerners eatwith knife and fork?

Do all westerners eata witha knife and fork?

比较而言，不需要冠词的表达语义更抽象。又如：

They eat with knife and fork. 他们用刀叉吃东西。

The child wasawkward with knife and fork. 这孩子用刀叉还不利索。

Do you eat ricewith knife and fork or with chopsticks? 你用刀叉吃饭，还是用筷子吃饭？