Thanks for your useful comments. Following your suggestions, I rewrote it and made many changes. I would greatly appreciate some more suggestions and criticism.
Ok... let see what you've done next :D .... Anyway, it's good if we have the prompt because then we can have a better idea about what it expects.
To me, choosing a graduate school always plays a significant role in long-term career development.
This is not a case with you alone, it is the same with others too.... You need to say things that stand out other applicants, so avoid making general statements about things those admin guys always hear. Focus more on the question they asked and make use of every word to answer them.
my decision to choose X University depends crucially on three factors: my research interests, the considerable prestige of X University through academic courses and close connections between my interests and those courses.
My decision to choose X University was influenced by its reputation for excellent academic courses and the alignment I find between my research interests and the features of its Research Department.