Three, (16 points) An engineering
team contracted two projects, Project A and Project B, with the workload of Project A being twice that of Project B. In the first half of the month, all workers worked on Project A, and in the second half of the month, the workers were divided into two equal groups, one group continued working on Project A, and the other group moved to Project B. After one month, Project A was completed, and the remaining workload of Project B was just enough for one worker to complete in one month. If each worker has the same work efficiency, how many workers are there in the engineering team?
Three, suppose this construction team has $x$ people, and the monthly work volume per person is 1. Then the work volume for site A is $\frac{\bar{x}}{2}+\frac{1}{2}$ $\frac{x}{2}$, and the work volume for site B is $\frac{x}{2} \times \frac{1}{2}+1$. According to the problem, we get $\frac{x}{2}+\frac{x}{4}=2\left(\frac{x}{4}+1\right)$. Solving for $x$ yields $x=8$.