"Look at the food, depending on your own situation" means: look at the amount of food you eat, or you will eat all the dishes you haven't finished; Cut clothes after measuring your figure, and save cloth. Metaphor takes corresponding actions and countermeasures according to existing conditions or things. It is also a metaphor to proceed from reality and not to make subjective assumptions.

From "Against stereotyped Party writing": "Look at the dishes and eat according to your own situation. What we do depends on the situation. We must know what to do in advance. You need a ruler in your heart to get things done. Do what you can, do what you can, do what you can, and don't do it blindly. Only by obeying the rules, following the law of development of things, and proceeding step by step according to the law, can things be done well.