Grav/Twig循环数组

我的Grav/Twig模板有一个简单的问题。我有一个.md文件，它的结构像这样…

---
class: news
title: Latest News
story:
  title: TITLE OF STORY
  date:
    month: April
    day: 2
    year: 2016
  highlights:
    points:
      - icon: mic.png
        text: Best Speaker Award
      - icon: trophy.png
        text: Winner as voted by audience
  quote: 
    text: “Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur dictum nisl quis pharetra dictum. Etiam ac egestas leo. Pellentesque tincidunt sem vel risus vehicula scelerisque. Cras rutrum, mauris viverra porttitor condimentum, orci quam condimentum libero, ac tempor nunc risus ac felis.”
    author: -Time Magazine
  cite: http://www.time.com
  image: awards.jpg
---

我想取出icon:mic.png和icon:trophy.png的值，并在我的news.twig.html文件中做这样的事情。。。

<div class="highlights">
    {% for highlight in page.header.story.highlights.points %}
      <div class="point">
        {% if highlight.text %}
        <span class="highlight-icon">              
          <img src="{{ page.media.images.[ {{ highlight.icon }} ].url }}">
        </span>
        {% endif %}
        {% if highlight.text %}
        <span class="highlight-text">{{ highlight.text }}</span>
        {% endif %}
      </div>
    {% endfor %}

但我在img标签的行上得到了一个错误，"预期名称或编号"

<img src="{{ page.media.images.[ {{ highlight.icon }} ].url }}">

提前感谢！！