diff --git a/application/controllers/keyworlds.php b/application/controllers/keyworlds.php
index 9b49868a..cbee8b1d 100644
--- a/application/controllers/keyworlds.php
+++ b/application/controllers/keyworlds.php
@@ -102,8 +102,8 @@ class Keyworlds extends CI_Controller {
                     $data['rank_json'] .='{"name":"' . $ra[$data_time[0]]->kw_keyworlds . '","data":[';
                     // 每个点
                     foreach ($ra as $v) {
-                        $kwr_rank = (intval($v->kwr_rank) > 0) ? $v->kwr_rank : 'null';
-                        $kwr_rank = ($v->kwr_rank==151) ? 'null' : $v->kwr_rank;
+                        $kwr_rank = (intval($v->kwr_rank) > 0) ? $v->kwr_rank : "null";
+                        $kwr_rank = ($v->kwr_rank==151) ? "null" : $v->kwr_rank;
                         if ($v->kwr_rank == '>150') {
                             $kwr_rank = 100;
                         }
@@ -115,8 +115,8 @@ class Keyworlds extends CI_Controller {
                     if ($data['wordcount'] == 1) {
                         $data['rank_json'] .='{"name":"' . $ra[$data_time[0]]->kw_keyworlds . '(mobile)","data":[';
                         foreach ($ra as $v) {
-                            $kwr_mobile_rank = (intval($v->kwr_mobile_rank) > 0) ? $v->kwr_mobile_rank : 'null' ;
-                            $kwr_mobile_rank = ($v->kwr_mobile_rank==151) ? 'null' : $v->kwr_mobile_rank;
+                            $kwr_mobile_rank = (intval($v->kwr_mobile_rank) > 0) ? $v->kwr_mobile_rank : "null" ;
+                            $kwr_mobile_rank = ($v->kwr_mobile_rank==151) ? "null" : $v->kwr_mobile_rank;
                             if ($v->kwr_mobile_rank == '>150') {
                                 $kwr_mobile_rank = 100;
                             }
diff --git a/application/views/keyworlds/index.php b/application/views/keyworlds/index.php
index 00d58858..37c7cb48 100644
--- a/application/views/keyworlds/index.php
+++ b/application/views/keyworlds/index.php
@@ -43,7 +43,7 @@
         <div id="zhexiantu" class="span12" style="height:<?php if($wordcount==1) {echo '620px';}else{echo '1000px;';} ?>;margin-left:0;padding-right: 15px;"></div>
         <?php } if (!empty($rank_info)) { ?>
         <legend>排名情况</legend>
-        <!-- if 151, null -->
+        <!-- if 151, null ? -->
         <table class="table table-striped">
           <thead>
             <tr>