MYKEMINI Weezy Weezy my blogmr site http://mainbazeng.blogmr.com when I post their image are big , it suppose to be small .... What can I do

 MYKEMINI Weezy <div id="content" class="content posts">
{% if posts_by_search %}
<div class="alert alert-info">
<h3>
Search "{{ posts_by_search }}".
</h3>
</div>
{% elseif posts_by_tag %}
<div class="alert alert-info">
<h3>
Tag "{{ posts_by_tag }}".
</h3>
</div>
{% elseif posts_by_category %}
<div class="alert alert-info">
<h3>
Showing posts under category "{{ posts_by_category }}".
</h3>
</div>
{% endif %}
<!-- // -->
{% if total_posts == 0 %}
<div class="alert alert-warning">
Empty post.
</div>
{% else %}
<!-- // -->
<div style="background-color:#009900;color:#fff;padding:4px;font-weight:bold;">Trending Updates</div>
{% for post in posts %}

<div class="post" id="post-{{ post.id }}">

<a href="{{ site.url }}/{{ post.link }}.html"> <div class="post-body">
{{ site.settings.display_thumbnail == 'yes' ? post.thumbnail|raw : '' }}{{ post.content|striptags|slice(0,0) }}{{ post.title }}
</div>
</a>
</div>

{% endfor %}
<div class="pager">
{{ pagination|raw }}
</div>
<div class="clear">
</div>
{% endif %}
</div>