Rose was wild with joy_______the result of the examination.

at the result of
罗斯对于考试的结果欣喜若狂
at对于

我觉得你直接记住最好，应是脱口而出，真的没有什么道理好讲
(used after many adjs and ns 用於许多形容词和名词之后)
delighted at the result 对结果满心欢喜 * puzzled at her silence 对她的缄默大惑不解 * his anger at being beaten 他被击败时的气恼.