jQuery：获取子节点和父节点结尾之间的内容并将其包装到div中

I have the following HTML:

我有以下HTML:

<div id="article-content">
                <p>content of article</p>
                <h3 id="last-heading"></h3>

                <p>Content part 1 of last heading</p>
                <p>Content part 2 of last heading</p>
                <a href="/go.html?url=https://www.google.co.in">Link</a>
                <div class="article-img"><img src="imgurl"/></div>...

        ..
        ..
        ..

            </div>
<div i