Section read more content list

I need to read all the files in multiple folders under content at the same time in one HTML of section
What should I do?

Your question is not clear.

If you want to show a summary of all regular pages (excludes sections, taxonomies, etc.) on the home page, include something like this in layouts/index.html:

  {{ range .Site.RegularPages }}
    <h2><a href="{{ .RelPermalink }}">{{ .Title }}</a></h2>
    <p>{{ .Summary }}</p>
    {{ if .Truncated }}
      <p><a href="{{ .RelPermalink }}">Continue reading...</a></p>
    {{ end }}
  {{ end }}