If you have written a Career Goal Statement that is tailored to the job description then you pretty much have the basis of the answer of this question.

This question is digging into whether you have done your appropriate research. Have you identified a reason why the hospital will help you in your career? For example, does it have good exam pass rates. Or is there a particular subspecialty that is not available elsewhere?

Whatever the case you should be able to identify something of value in the position that will help you. Make sure that you are emphasising that its a positive factor about the health service or hospital. Interview panels want to hear nice praise about their institution. But also make sure that you quickly bring it back from your personal needs to what you can give to the hospital.