使用正则表达式匹配多个标题样式

我试图使用regex来捕获节标题,但是为什么我能够用它捕获“4.1 general”,但是如果我在regex的末尾添加一个新行 \n([\d\.]+ ?\w+)\n 它不再捕捉那条线了?是不是没有换行,还是我遗漏了什么?

Here's my example for reference

\n([\d\.]+ ?\w+)

输入

3.6.10
POLLUTION DEGREE 4
continuous conductivity occurs due to conductive dust, rain or other wet conditions
3.6.11
CLEARANCE
shortest distance in air between two conductive parts
3.6.12
CREEPAGE DISTANCE
shortest distance along the surface of a solid insulating material between two conductive
parts
4 Tests
4.1 General
Tests in this standard are TYPE TESTS to be carried out on samples of equipment or parts.

\n([\d\.]+ ?\w+)\n? 似乎也没用。