The first thing to do is to examine the topic, understand the key points, what is practice, and what attributes it includes, and then write it down, and then it is necessary to write it down, that is, how to treat practice in Marxist epistemology, (first get perceptual knowledge, then rational knowledge, and then guide practice through rational knowledge, and so on)
Then, talk about other epistemology in history, focusing on the comparison with Marxist epistemology, dialectically denying other epistemology and highlighting the correctness of Marxist epistemology, such as empiricism, rationalism, Kant, skepticism and encyclopedic epistemology. And then compared with Marxist epistemology, it is concluded that Marxist epistemology is scientific and correct.
Then talk about the way of existence, first write down the materialism of dialectical materialism, what matter determines consciousness, existence determines spirit, etc., to highlight the materiality of the world, and then give one or two examples to supplement it; Then write down the relevant theories of historical materialism, such as social existence determines social consciousness, economic base determines superstructure, and productivity determines production relations. Write it down and give one or two examples to prove it. Finally, summarize the way of human existence.
Finally, it is necessary to comprehensively discuss the above two aspects and draw a conclusion, which is the proposition you said. Of course, there must be a reasoning process. I won't talk about it here. Look at what you said, don't give any more examples.