1. The word "optimization" means that a certain choice or method is preferred, and it is more likely to be considered as having creative advantages or achieving better results compared with other possible choices or methods.
2. "Optimization" does not involve whether the invention can be realized, nor does it limit the content of the invention. It is just a descriptive word to indicate that the inventor thinks this choice or method is the best or the first choice.
3. In the patent application, the inventor may put forward many different options or methods, and each option or method has its advantages and disadvantages. The appearance of the word "first choice" can help readers better understand which option or method the inventor thinks is the most suitable.
In a word, the word "preferred" is used in patent application documents to describe that a certain choice or method is the best choice and help to determine the scope of patent protection.