这是您要实现的目标吗?

Is this what you are trying to achieve?

$("h2").click(function () {
    $("h2").not(this).parent().next().hide();
    $(this).parent().next().show();
});

说明:

• 获取所有H2，除了单击的以外，转到父级(包含H2的DIV)，获取下一个元素(包含内容的DIV)，隐藏所有包含的DIV内容
• 以点击的H2进行遍历，确保显示包含内容的DIV

• Take all the H2s, except the clicked one, go to parent (DIV containing the H2s), get next element (DIV with content), hide all the DIVs containing content
• Take the clicked H2, traverse in the similar manner, make sure the DIV with content is shown