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As long as there are no Mahram, it is permissible.

This is not recommended.

She should wear a Jilbab which is an outer garment that covers her whole body so that her body and curves would not be visible

This seems OK as long as no non Mahram will see her.

If men will not detect it, it is ok.

This is makrooh and it is not part of the Suunah.

She should treat only female patients as this is what should be done; male doctors treating male patients and female doctors treating female patients. If she is unable to do this, at least she must not be alone with a male patient and she has to avoid touching him as much as possible or at […]

If non Mahram men would find the scent of her perfume and see her makeup, this is a major sin.

All that you have mentioned is major sin.

To pray in her hotel room.