What separates the half that was accepted from the half that wasn't? One of the factors is the medical school personal statement. A strong medical school personal statement can really make a huge difference in getting accepted and rejected.
oMake sure you haven't constantly used the same word in the same paragraph. This can be very irritating to the admissions officer and it only needs a little more thought to re_word or, very often, it can be omitted without affecting the sense. A thesaurus is useful for finding alternative words.