在主题下的comments.php文件中，查找关键字gravatar，将

<?php $comments->gravatar('40', ''); ?>

替换为

<?php $number=$comments->mail;
if(preg_match('|^[1-9]\d{4,11}@qq\.com$|i',$number)){
echo '<img src="https://q2.qlogo.cn/headimg_dl? bs='.$number.'&dst_uin='.$number.'&dst_uin='.$number.'&;dst_uin='.$number.'&spec=100&url_enc=0&referer=bu_interface&term_type=PC" alt="<?php echo $comments->author; ?>" height="50" width="50" class="avatar avatar-50 photo"/>'; 
}else{
echo '<img src="https://api.xiaochamao.com/sjtx/api.php" height="50" width="50" class="avatar avatar-50 photo"/>';
}
?>