Hi! So I just received my very first rejection ever. It was 3 paragraphs of advice on my writing and how to improve it because I was just oh so close to getting accepted. I write fantasy so agents require sample pages with queries. My question is, how far should I take this agent's advice? Should I rewrite my whole prologue because she suggested it? I'm still waiting to hear back from 2 more (fantasy agents are hard to come by). I just don't know since I've never received professional advice before how much of it I really need to take to heart, versus maybe that's just her opinion. Thoughts?