Hello! I'd be glad to explain you the phrase. "nobody was more glad to see Pooh than he was, still there it was, some lived in trees and some lived underground" simply means "Rabbit was glad to see Pooh, but he didn't want him to stay in his house forever because they're just too different". Some parts that might need extra explanation: "still there it was" is an expression that means "still, it remained" or "the fact remained" or simply "but", explaining that NO MATTER how much the Rabbit liked Pooh, he didn't want him to stay. "some lived in trees and some underground" is an author's expression, meaning that the Rabbit and Pooh are different. Like the rabbit lived underground and the bear got on trees for honey, and that's two separate ways of living. Hope that made it all clear!

And that although he, Rabbit, is always very happy to see Winnie the Pooh, but one is supposed to live on earth, and others underground, and ...(Trees, sea). Each animal has its own place.

Aww! I love Winnie the Pooh! So, when he came out of the hole, -Rabbit was excited to see him-. Nobody was more glad to see Pooh than he was (In simple words, Rabbit was excited to see Pooh, but not completely. If Pooh is in the hole, how can Rabbit live?' The way he said it, was very poetic. So it is hard to understand. Do you understand- still some lived in trees and some lived underground-?