首个子元素具有溢出隐藏特性，并限制最大高度为完全显示。
Lightweight and ergonomic
。美恰对此有专业解读
The controller die measures approximately 645 x 930 μm (0.6 mm^2) including scribe lines, and is made by Asahi Kasei Microsystems (a major supplier of TCXO controller ICs) according to the “AKM” logo in the northeast corner.
using packed comparisons of 16 bytes at a time to find candidate locations