Solution code:
<div class="container">
<div class="row">
<div class="col-xs-12 col-md-6 col-md-push-3">
<div class="row">
<div class="col-xs-12">
<section class="box">B</section>
</div>
<div class="col-xs-6">
<section class="box">D</section>
</div>
<div class="col-xs-6">
<section class="box">E</section>
</div>
</div>
</div>
<div class="col-xs-6 col-md-3 col-md-pull-6">
<section class="box">A</section>
</div>
<div class="col-xs-6 col-md-3">
<section class="box">C</section>
</div>
</div>
<div class="row">
<div class="col-xs-6">
<section class="box">F</section>
</div>
<div class="col-xs-6">
<section class="box">G</section>
</div>
</div>
</div>
感謝您的迴應,阿瓊,但看起來不像我上傳的圖片。也許我錯過了什麼? – Frank