给.riqi的父元素清除浮动后，为什么还是高度塌陷？
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<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
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<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
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<div class="zhuanke">专科</div>
<div class="teshu">
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
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<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
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<div class="zhuanke">内科</div>
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<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
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<div class="zhuanke">内科</div>
<div class="teshu teshu1">
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
<a href="#">特殊门诊科</a>
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<div class="guize">
预约规则<span>（更新时间每日8：30更新）</span>
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<div class="guizeneirong">
<div class="zhouqi">
<span class="yuyuezhouqi">预约周期：</span>
<span class="qitian">七天</span>
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<div class="zhouqi">
<span class="yuyuezhouqi">放号时间：</span>
<span class="qitian">8:30</span>
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<span class="yuyuezhouqi">停挂时间：</span>
<span class="qitian">下午14:00停止次日预约挂号<br> （周五14：00后挺挂至下周一）</span>
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<div class="zhouqi">
<span class="yuyuezhouqi">退号时间：</span>
<span class="qitian">就诊前一天工作日14:00前取消</span>
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<div class="zhouqi zhouqi1">
<span class="yuyuezhouqi">特殊规则：</span>
<span class="qitian"><br> ①就诊前一天工作日14:00前取消<br> 就诊前一天工作日14:00前取消就<br> 诊前一天工作日14:00前取消就诊<br> 前一天工作日14:00前取消就诊前<br> 一天工作日14:00前取消就诊前一<br> 天工作日14:00前取消就诊前一天<br> 工作日14:00前取消就诊前一天工<br> 作日14:00前取消就诊前一天工作<br> 日14:00前取消就诊前一天工作日<span>
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<div class="guize">
预约规则<span>（更新时间每日8：30更新）</span>
</div>
<div class="guizeneirong">
<div class="zhouqi">
<span class="yuyuezhouqi">预约周期：</span>
<span class="qitian">七天</span>
</div>
<div class="zhouqi">
<span class="yuyuezhouqi">放号时间：</span>
<span class="qitian">8:30</span>
</div>
<div class="zhouqi">
<span class="yuyuezhouqi">停挂时间：</span>
<span class="qitian">下午14:00停止次日预约挂号<br> （周五14：00后挺挂至下周一）</span>
</div>
<div class="zhouqi">
<span class="yuyuezhouqi">退号时间：</span>
<span class="qitian">就诊前一天工作日14:00前取消</span>
</div>
<div class="zhouqi zhouqi1">
<span class="yuyuezhouqi">特殊规则：</span>
<span class="qitian"><br> ①就诊前一天工作日14:00前取消<br> 就诊前一天工作日14:00前取消就<br> 诊前一天工作日14:00前取消就诊<br> 前一天工作日14:00前取消就诊前<br> 一天工作日14:00前取消就诊前一<br> 天工作日14:00前取消就诊前一天<br> 工作日14:00前取消就诊前一天工<br> 作日14:00前取消就诊前一天工作<br> 日14:00前取消就诊前一天工作日<span>
</div>
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<div class="riqi"><img src="图片素材/icon-info.jpg">您还没有选择就诊日期</div>
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同学，你好。这里不需要给.riqi的父元素清除浮动，只需要给.riqi上面的两个浮动的兄弟元素清除浮动就可以了，如图：
祝学习愉快！
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