An hour is a period of time while one o 'clock is a point of time.

一个小时是一段时间，而一点钟是一个时刻。

youdao

And at one point Mr O'Neill quotes Mr Rumsfeld as saying it was not his aim to get rid of Saddam.

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Mr O'Rourke said at one point McGarry, of no fixed abode, was hit on the back of the head with a bottle in the kitchen and retaliated by throwing a bottle at Mr Galt, which missed but broke a window.

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On one level, Mr O'Neill has a point.

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