怎么拒绝美国大学的offer

怎么拒绝美国大学的offer 言简zhidao意赅就行，版下文仅供参考：权
Dear Sir
I feel so regret to write this letter to you because I choose another university as my target school after careful considerations, so I have to decline your offer .
Even though, I still thank all your appreciation and encouragement on me, which will also inspire me to pursue my dream.