Programmer: One-track-minded people usually have a high degree of concentration and patience, which is very useful in programming. They may study deeply in a certain technical field and write high-quality code, thus becoming technical experts.

2. Researchers: One-track-minded people usually have firm beliefs and persistent pursuits, which are very useful in the field of scientific research.

3. Salesperson: One-track-minded people usually have firm beliefs and persistent pursuits, which are equally important in the sales field. They will persistently promote products or services in order to achieve better sales performance.

4. Futures traders: Futures traders need people who are not rigid and flexible. They just need to implement the trading system mechanically, instead of abandoning and changing the trading system casually.

5. Artists: One-track-minded people usually have unique creativity and persistent pursuit, which is very useful in the art field. They may study deeply in an art field and create unique works, thus gaining recognition and success.