Okay, I can see how the language would be a problem, but my answer to the question would have been 'That is none of your business. You're a gyno, not a dietician, so stick to what you actually here for.'
I've had problems with doctors and I know arguing with them is not easy, especially in a foreign language (English is not my native language either). Try to keep in mind that it's not just you - the doctors there just seem to be idiots. And it's almost over, so you won't have to put up with them much longer. Keep hanging in there. ((hugs))