Mainly physical fitness, and then seize the opportunity to accelerate.
2 months, run 2-3 laps every morning, not too fast, mainly to maintain physical fitness.
One week before the sports meeting, you don't have to run so much in the morning, just 800 meters. Time yourself to run laps. You only accelerate at the point where you still have 200, 300 meters or how many meters left, but the acceleration should be added to the finish line, otherwise it is meaningless.
The above is my own understanding, not professional.