True- rice is mostly pure carbs. However, brown rice is generally a much healthier option if you use it in your cooking regardless.
However, let's break this down:
4 basic types of energy for the body
Carbs- main source of energy. stick to mono- and disaccharides.
Lipids- fats, steroids, waxes. Essential in small amounts
Protein
Nucleic Acids- no real affect on dietary intake.
Cut back on the cards, and stay away from the lipids. But you need more than a good diet to get to a healthy weight- you need to work off all that adipose and cellulite.