diff --git a/blog/templatetags/blog_tags.py b/blog/templatetags/blog_tags.py
index d29e032..b7ff3c5 100644
--- a/blog/templatetags/blog_tags.py
+++ b/blog/templatetags/blog_tags.py
@@ -148,9 +148,9 @@ def load_sidebar(user, linktype):
     tags = Tag.objects.all()
     sidebar_tags = None
     if tags and len(tags) > 0:
-        s = list(map(lambda t: (t, t.get_article_count()), tags))
-        count = sum(map(lambda t: t[1], s))
-        dd = 1 if (count == 0 and not len(tags)) else count / len(tags)
+        s = [t for t in [(t, t.get_article_count()) for t in tags] if t[1] > 0]
+        count = sum([t[1] for t in s])
+        dd = 1 if (count == 0 or not len(tags)) else count / len(tags)
         import random
         sidebar_tags = list(map(lambda x: (x[0], x[1], (x[1] / dd) * increment + 10), s))
         random.shuffle(sidebar_tags)
diff --git a/templates/blog/article_detail.html b/templates/blog/article_detail.html
index f404410..d0bc985 100755
--- a/templates/blog/article_detail.html
+++ b/templates/blog/article_detail.html
@@ -58,7 +58,8 @@
             {% else %}
                 <div class="comments-area">
                     <h3 class="comment-meta">您还没有登录，请您<a
-                            href="{% url "account:login" %}?next={{ request.get_full_path }}">登录</a>后发表评论。</h3>
+                            href="{% url "account:login" %}?next={{ request.get_full_path }}" rel="nofollow">登录</a>后发表评论。
+                    </h3>
 
                     {% load oauth_tags %}
                     {% load_oauth_applications request %}
diff --git a/templates/share_layout/base_account.html b/templates/share_layout/base_account.html
index 6457260..d7160b5 100644
--- a/templates/share_layout/base_account.html
+++ b/templates/share_layout/base_account.html
@@ -9,7 +9,7 @@
     <meta name="description" content="">
     <meta name="author" content="">
     <link rel="icon" href="../../favicon.ico">
-
+    <meta name="robots" content="noindex">
     <title>{{ SITE_NAME }} | {{ SITE_DESCRIPTION }}</title>
     {% load compress %}
     {% compress css %}