我有一个非常基本的文件；
15
Chapter name
some text and some more text
some text and some more text
我试图得到这样的东西
Book: 15 Chapter name
some text and some more text
some text and some more text
我尝试使用 sed 和这种模式来做到这一点；
sed 's/^\([[:digit:]]\+\)\n\([[:alpha:]].*$\)\n$/Book: \1 \2\n/g'
显然，这在终端上不起作用，但是在 VIM 版本中可以完美运行sed。
我在 Linux 机器上有一个非常基本的文本文件，其中包含章节、对话和参考资料等内容。
这就是它的样子
Chapter: 1 One: Birds and Trees
Birds are beautiful and trees are amazing and
they are dependent on each other. Birds most of the time
choose to make their nests on trees since trees provide more
stability. One day the bird sat on a tree and said;
Bird: Oh my I'm so tired from all the flying, I should take a rest
Tree: Mr Bird, you seem tired, perhaps you should take some rest, and
here are some fruits to quench your thirst.
Bird: Oh thank you very much!
Reference: Chapter 1: birds and trees
Chapter: 2 Two: Trees and Fruits
Fruits are very delicious to eat and they are mostly found
in trees. Fruits contain essential vitamins, minerals and loads
of good fibers.
Reference: Chapter 2: trees and fruits
这些是 txt 文件的内容。现在假设我正在搜索quench，我认为它会从章节号开始直到参考。所以我尝试使用 grep;
$ grep -A 5 -B 5 'quench' file.txt
但是，这并没有产生所需的输出。我期望的是这样的；
Chapter: 1 One: Birds and Trees
Birds are beautiful and trees are amazing and
they are dependent on each other. Birds most of the time
choose to make their nests on trees since trees provide more
stability. One day the bird sat on a tree and said;
Bird: Oh my I'm so tired from all the flying, I should take a rest
Tree: Mr Bird, you seem tired, perhaps you should take some rest, and
here are some fruits to quench your thirst.
Bird: Oh thank you very much!
Reference: Chapter 1: birds and trees
并且，搜索单词“维生素”会打印出来；
Chapter: 2 Two: Trees and Fruits
Fruits are very delicious to eat and they are mostly found
in trees. Fruits contain essential vitamins, minerals and loads
of good fibers.
Reference: Chapter 2: trees and fruits
我想知道这是否可以通过 sed 或 awk 实现。
PS：每一行都是真正的新行