根据上下文提示补全对话。

A: What's on the farm?

B: ____ ____ a lake and some trees.

A: Is the farm ____?

B: Yes, it's very big.

A: ____ ____ an elephant on the farm?

B: Yes, there is. It's very strong.

A: Is there a house?

B: No, there ____.

事情总是这样，哪里有可卑的利己主义，哪里也会有悲壮的舍己救人。“这样”指代什么？