I was surprised at her reaction.

我对她的反应是感到惊讶的。

youdao

I'm not surprised at her reaction.

我对她的反应并不感到吃惊。

youdao

She gave her reaction to his release at a press conference.

她在一次新闻发布会上就他的释放做出了回应。

《柯林斯英汉双解大词典》

She spent many days last summer yelling at her television,she says, in reaction to the health care debate.

VOA: special.2010.03.06

After a while, they seemed to have no reaction at all to her story, which was what made her stop telling it.

NEWYORKER: The Repatriates

At the time of Ms Dugmore's extreme allergic reaction, her sensitivity to latex had been established and she had been given vinyl gloves.

BBC: Appeal over hospital glove allergy claim

Even as violent reaction to her death continues throughout the rest of the country, at least 10 people reportedly died overnight during the unrest.

NPR: Pakistan Weeps for Benazir Bhutto