1) demonstration by example (example method): give conclusive, sufficient and representative examples to prove the argument; (Function: Demonstrate the viewpoint (main argument or sub-argument) concretely and forcefully, and enhance the persuasiveness of the article)

2) Reasoning: use the incisive opinions in classic works, famous sayings and aphorisms of famous people at home and abroad, and recognized theorem formulas to prove the argument; (Function: effectively demonstrate the viewpoint (main argument or sub-argument) and enhance the authority and persuasiveness of the article)

3) Comparative argument: compare the positive and negative arguments or arguments, and prove the arguments in comparison; (Function: Highlight and comprehensively demonstrate opinions (main arguments or sub-arguments), which is impressive)