问为什么Asp.Net MVC 5把@ Scripts.Render（“〜/ bundles / jquery”）放在_Layout.cshtml的底部？

    @RenderBody()
    <hr />
    <footer>
    </footer>
</div>

    @Scripts.Render("~/bundles/jquery")
    @Scripts.Render("~/bundles/bootstrap")
    @RenderSection("scripts", required: false)
</body>
</html>

<script>
    $(document).ready(function () { /// $ not defined.
        // .....
    });
</script>

    <hr />
    <footer>
    </footer>
</div>

<script src="/Scripts/jquery-1.10.2.js"></script>
<script src="/Scripts/bootstrap.js"></script>