A. Steamed bread mainly provides starch, ribs mainly provide protein and fat, and celery mainly provides vitamins and inorganic salts. This recipe is comprehensive and reasonable, and meets the meaning of the question.

B, prawns, beef and eggs mainly provide protein and fat. This recipe contains no nutrients such as fruits and vegetables, vitamins, and starchy foods. This recipe is not comprehensive in nutrition and does not meet the problem.

C, rice mainly provides starch and so on. Chinese cabbage and Qin Rong mainly provide vitamins and inorganic salts. Without lean milk and eggs, protein cannot be provided. This recipe is not comprehensive in nutrition and does not meet the meaning of the question;

D Fat meat mainly provides fat, wax gourd mainly provides vitamins and inorganic salts, and bread mainly provides starch. Protein cannot be provided without lean milk and eggs. This recipe is not comprehensive in nutrition and does not meet the problem.

So choose: a.