四．短文改错（10分）

This is a story told by my father: When I was boy, the most exciting thing was when to celebrate the Spring Festival. My grandma was the best cooker in th world but could make the most delicious dishes. Once, I just couldn’t wait for the Spring Festival dinner. As I was about take a piece from a cooked duck, I saw Grandma in the kitchen looking at me. Shake his head, she said, “It’s not a good time to do that, dear.” I apologize and controlled me at the best till the dinner started. You know, that was a dinner we had waited for several month.

如何理解湿温病的初起“三禁”？（6分）