Evaluating set-piece defense

I'm thinking we can talk about losing points from set pieces generally and mention common causes and adjustments. I want to respond concisely in Chinese and include an English translation.

I’ll make sure to provide an analysis on key defensive strategies like marking and first contact. Then, I should ask if the user wants me to expand on this, possibly offering options for different outputs. I'll need to keep the formatting light, maybe with simple bullet points. Let's go for it!