【正确答案】Dear Lily,
I've just learned that you are admitted to MIT. Congratulations! MIT is such a prestigious university that becoming an MIT student means a giant step towards a bright future!
I know you've longed to pursue graduate studies in an American university. Looking back at the efforts you made to realize this dream, I should say that all your diligence, perseverance and intelligence have been paid off. We are all proud of you.
May the future grant you opportunity and the fulfillment of all your dreams.
Sincerest congratulations and best wishes.