* 时间O(n) 空间O(n)（理论最优，无冗余计算）
The desk is infinitely adjustable, but not quickly adjustable. It stays at standing height. Until recently, I would switch throughout the day between standing on a balance board from FluidStance and sitting on a Håg Capisco stool. Both have now been replaced by an inexpensive treadmill. I’ve found typing while walking to be easier than I’d imagined, but using my trackball mouse to be a bit more difficult than expected. So I’ve customized the mouse significantly to increase its functionality and to reduce the need for precision.
。业内人士推荐同城约会作为进阶阅读
Reading English from 1000 AD
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