<p class="ql-block">二楼楼梯</p> <p class="ql-block">下</p> <p class="ql-block">中</p> <p class="ql-block">上</p> <p class="ql-block">三楼楼梯</p> <p class="ql-block">下</p> <p class="ql-block">中</p> <p class="ql-block">上</p> <p class="ql-block">四楼楼梯</p> <p class="ql-block">下</p> <p class="ql-block">中</p> <p class="ql-block">上</p>