Style Attribute In HTML Tags

I’m sorry for my poor English.
When the results are outputted, I’d like to include style attribute(style="~~~") to tags.

Hello, world!

Hello, world!

I carefully read the HELP, but I can’t find ;(
Please tell me how I can do this?

Hi there, I’m afraid that’s not something we support in Full-Text RSS. The goal of the software is to return content with as little as the original site-specific styles as possible. If you’d like to style the output yourself, you will have to rewrite the HTML you get back using your own code.