Blind people touch elephants - it is said that several blind people touch an elephant, those who touch the legs say that the elephant is like a pillar, those who touch the body say that it is like a wall, and those who touch the tail say that the elephant is like a snake. They hold their own opinions. Blind people touch elephants is used to refer to people who do not understand things comprehensively.
According to the above definition, which of the followings cannot be described as blind people touch elephants?
In the sampling survey, the survey team only selected a few cases for investigation.