go down the rabbit hole: refers to getting deep into something, or ending up
somewhere strange.
用来描述一个不寻常、不熟悉的地方，或者一种奇怪的心境.
I've stayed away from drugs and alcohol since coming to college. I have an addictive
personality, so I decided to just avoid going down that rabbit hole altogether.
Are you sure you're ready to go down the rabbit hole of owning your own business? It is
a huge responsibility full of unexpected challenges.
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