pick up/take

[user_gary]

I kept my book on the crooked stand. Please pick up the book if it fall down and keep it with you until I come.

Can I replace the "pick up" by "take" in this context?

I think we can becaue "take" has the meaning of "pick up".

Please you help me on this.

[Anglika]

Take does not have the same meaning as pick up in this context, since your book has fallen down. So you are asking the person to pick the book up off the floor.

[user_gary]

Thank you.
But I have heard the phrase "take something" more often though I cannot remember right now.

Could you tell me in what context the "take" should be used in this sense?

[Anglika]

Can you give an example of "take something" used in this way?

[user_gary]

Thank you, again.
Please take my book to my office.
Please take this chocolates for your sister.

[Anglika]

In neither of your (excellent) examples is there the context of something being on the ground and needing to be picked up.

In both cases, your sentence is an instruction to convey something from somewhere to somewhere else [and nb = this chocolate/these chocolates].