Final answer:
Without the specific context or the name of the movie, it's not possible to provide an accurate answer regarding what Dr. Bates gives Mary.
Step-by-step explanation:
The question seems to refer to an event at the beginning of a movie, but without specific context or the name of the movie, it is impossible to provide a factual answer. In general, such an item given by a character like Dr. Bates to another character like Mary at the beginning of a movie could serve as an important plot point or symbol.
However, since the exact movie is not identified, answering which item Dr. Bates gives Mary would be purely speculative. If the student can provide the name of the movie or additional context, a more accurate and informative response can be given.