我已经开始转换到html5，并且一直在努力获得section标签的概念以及确切需要使用的位置。我在下面的代码中得到了正确的想法吗？
<body>
<header>
<h1>Chris Mepham</h1>
<section id="who">
<h2>Who am I?</h2>
<p>I am a freelance web designer and programmer
based in Sudbury, Suffolk. I create modern, bespoke
websites and applications for businesses in the uk at
affordable prices.</p>
</section>
<section id="what">
<h2>What can I do?</h2>
<p>I can create you a website and put it online! From
conseption through to delivering the finished website.
I will ensure the site has been created with strict W3C
compliance to ensure maximum cross-browser compatibility.</p>
</section>
<section id="skills">
<h2>My Skills</h2>
<p>List of skills.</p>
</section>
</header>
</body>