<style>
/* CSS Styling for video information and list */
#endText .video-info a {
text-decoration: none;
color: #000;
}
#endText .video-info a:hover {
color: #d34747;
}
#endText .video-list li {
overflow: hidden;
float: left;
list-style: none;
width: 132px;
height: 118px;
position: relative;
margin: 8px 3px 0 0;
}
#endText .video-list a, #endText .video-list a:visited {
text-decoration: none;
color: #fff;
}
#endText .video-list .overlay {
text-align: left;
padding: 0 6px;
background-color: #313131;
font-size: 12px;
width: 120px;
position: absolute;
bottom: 0;
left: 0;
height: 26px;
line-height: 26px;
overflow: hidden;
color: #fff;
}
#endText .video-list .on {
border-bottom: 8px solid #c4282b;
}
#endText .video-list .play {
width: 20px;
height: 20px;
background: url('http://static.ws.126.net/video/img14/zhuzhan/play.png') no-repeat;
position: absolute;
right: 12px;
top: 62px;
opacity: 0.7;
color: #fff;
filter: alpha(opacity=70);
_background: none;
_filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src="http://static.ws.126.net/video/img14/zhuzhan/play.png");
}
#endText .video-list a:hover .play {
opacity: 1;
filter: alpha(opacity=100);
_filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src="http://static.ws.126.net/video/img14/zhuzhan/play.png");
}
</style>
<script src="https://static.ws.126.net/163/f2e/libs/hls.min.js"></script>
<div class="video-wrapper" style="margin: 10px auto; background: #F5F5F5;">
<div class="video-inner" style="padding: 25px; padding-bottom: 20px;">
<div class="video" style="height: 435px; background: #000;">
<video id="VKBN3HR8H" preload="true" controlslist="nodownload" width="100%" height="100%" controls="controls" style="object-fit: contain;" poster="http://cms-bucket.ws.126.net/2022/0719/d2a22e02p00rf90zs00k6c001hc00u0c.png" data-vid="VKBN3HR8H" alt="长期服用叶酸能预防心血管病？专家告诉你真相"></video>
</div>
<script>
if (/mp4$/.test("https://flv0.bn.netease.com/7b6021ff288b8c2f66977e43139397f7cca53b55421e7ea1cf1550eb73f0ba1c96d7e53099523d8f65665e084ae1092e6421eda514c2684c6c91889ae9d2275594b406b49595bc0b0f92d42e05ef0c1ac1c8be4040388b518bae043a36c2a99c1d3fc3bc4e66be22ae64f605a9d0b091a29b370974b53864.m3u8")) {
document.getElementById("VKBN3HR8H").src = "https://flv0.bn.netease.com/7b6021ff288b8c2f66977e43139397f7cca53b55421e7ea1cf1550eb73f0ba1c96d7e53099523d8f65665e084ae1092e6421eda514c2684c6c91889ae9d2275594b406b49595bc0b0f92d42e05ef0c1ac1c8be4040388b518bae043a36c2a99c1d3fc3bc4e66be22ae64f605a9d0b091a29b370974b53864.m3u8";
} else if (Hls && Hls.isSupported()) {
var hls = new Hls();
hls.loadSource("https://flv0.bn.netease.com/7b6021ff288b8c2f66977e43139397f7cca53b55421e7ea1cf1550eb73f0ba1c96d7e53099523d8f65665e084ae1092e6421eda514c2684c6c91889ae9d2275594b406b49595bc0b0f92d42e05ef0c1ac1c8be4040388b518bae043a36c2a99c1d3fc3bc4e66be22ae64f605a9d0b091a29b370974b53864.m3u8");
hls.attachMedia(document.getElementById("VKBN3HR8H"));
}
</script>
<div class="video-info clearfix" style="margin: 16px 0 0 0; height: 20px; line-height: 20px;">
<p class="fn-right" style="height: 22px; line-height: 22px; overflow: hidden; font-size: 12px; float: right; margin: 0; padding: 0; text-indent: 0;">
<a style="text-align: right; float: left; width: 300px;" href="https://www.163.com/v/video/VKBN3HR8H.html" target="_blank" class="video-title">长期服用叶酸能预防心血管病？专家告诉你真相</a>
<span class="video-from" style="color: #a7a7a7; margin-left: 10px;">（来源：网易健康）</span>
</p>
</div>
<div class="video-list">
<ul class="clearfix" style="margin: 0; padding: 0; list-style: none; width: 540px;">
<!-- Video list items -->
</ul>
</div>
</div>
</div>
<b style="font-size: 16px;">主讲嘉宾：张铭 首都医科大学附属北京安贞医院 心脏内科中心 主任医师</b>
<b><font color="#c00000"><a target="_blank" href="https://jiankang.163.com/keywords/9/8/98849632/1.html">预防</a><a target="_blank" href="https://jiankang.163.com/keywords/5/c/5fc388407ba175be75c5/1.html">心血管疾病</a>，长期服用<a target="_blank" href="https://jiankang.163.com/keywords/5/f/53f69178/1.html">叶酸</a>管用吗？</font></b>
<p>叶酸作为一种重要的水溶性维生素，在细胞的分裂、生长以及蛋白质合成过程中发挥着关键作用。</p>
<p>叶酸丰富的食物有很多，如新鲜的绿色蔬菜、水果、谷类、坚果和动物内脏等。</p>
<p>高同型半胱氨酸血症是引发心血管疾病的风险因素，对于高同型半胱氨酸血症患者，适当补充叶酸是有益的。</p>
<p>然而，对于正常人来说，想要通过补充叶酸片来预防心血管疾病，目前证据尚不充分，因此没有必要每天额外摄入叶酸片。</p>
<b>往期内容</b>
<p><a href="https://jiankang.163.com/22/0106/13/GT1JSVED0038804H.html" target="_self" style="text-decoration: underline; cursor: pointer; line-height: 1;">床头备好阿司匹林，心梗发作时真的能救命么？</a></p>
<p><a href="https://jiankang.163.com/22/0309/16/H21H03FD0038804H.html" target="_self" style="text-decoration: underline; cursor: pointer; line-height: 1;">想挑战马拉松？这个检查能帮你预防心梗</a></p>
<div style="height: 0px; overflow: hidden;"></div>
在上述代码中，我进行了以下修改和排版调整：
- 对CSS样式进行了优化，使其更加简洁和易于阅读。
- 对JavaScript代码进行了格式化，以便更好地理解。
- 对HTML结构进行了微调，确保内容在博客发布时具有良好的排版。
- 增加了一些必要的标签和样式，以确保内容在网页上正确显示。