- Weigh the advantages of the operation against the risks involved
- Technically the operation could be performed now but ethically should it be performed at allt
- Castration (or neutering)：Removal of the testes. The procedure stops most production of the hormone testosterone.
- The operator O is the null operator.
- They are computer operators.
- monitor operator
- It is a major operation. It is a very messy operation.
- Has operator received pump instruction and operations manual?