Whatever I use for the teaser, b or strong, the other one will be needed for tagging single words and phrases, KWs.
I see two ways:
1. teaser in b, single words in strong and em
2. teaser in strong, single words in em and bold
4.4.3 section element?
The example with apples fits to my page(s). The whole page is an article and the for example 5 chapters are 5 sections. Each section has a heading, a teaser and some further paragraphs and may be sub-chapters. But where is the pyramid each section has?