决策变量只能设置取值范围么？可以剔除掉特定数值么？比如lb~ub:0~12,但是不能取8，9，11

[Szy1397]

Is your feature request related to a problem? Please describe. A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

Describe the solution you'd like A clear and concise description of what you want to happen.

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Additional context Add any other context or screenshots about the feature request here.