a methodical investigation的用法和样例：
- The police made a methodical search of the house.
- The importance and complexity of distant hybridization were discussed and a method investigating the molecular mechanism of distant cros-incompatibility was presented.
- An instrument or a method for inflicting such pain.
- Professor Fang worked out a method to destroy bacteria on the seeds.
- Why do we need a method of investment appraisal?