Protecting buffers which aren't visiting files

[Otto Maddox]

I use a lot of scratch buffers (which don't visit files), and I've lost
a lot of work due to accidentally quitting Emacs or killing those
buffers, because Emacs doesn't ask for confirmation. Is there a way of
configuring Emacs to treat buffers which don't visit files the same way
as file-visiting buffers, for this situation?

Thanks.

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