The future is in the details

网友回答

英语又称介词的语言,在i've got a question 后一般跟三种介词,on,for,about,后跟名词性成分.
i've got a question本身主谓宾语都齐了,后面的东西实际上是给question的一种限制,根据限制的不同分别用不同的介词.
后跟人物：i've got a question for you.（常用）
i've got a question for everybody up here.（常用）
后跟事物或事情：
i've got a question on that.（常用）
i've got a question on the matter of how old you are.（不常用）
i've got a question about how old you are.（常用）
i've got a question about how you helped them to figure it out.（常用）
所以这个句子的问题在于两点：
1.要么直接断句：
i've got a question for you ,how old are you?
2.要么加介词并把how old are you变成how old you are
i've got a quesion about how old you are（常用）
或i've got a quesion on the matter of how old you are（不常用）
======以下答案可供参考======
供参考答案1:
细节决定未来
供参考答案2:
未来是细节