Patients were warned to expect some disruption as a five-day strike by resident doctors in England got under way on Wednesday 17 December.
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，详情可参考搜狗输入法2026
// 计算天数：栈非空→栈顶索引-当前索引；栈空→0（易错点3：索引差别写反）。业内人士推荐服务器推荐作为进阶阅读
Finding these optimization opportunities can itself be a significant undertaking. It requires end-to-end understanding of the spec to identify which behaviors are observable and which can safely be elided. Even then, whether a given optimization is actually spec-compliant is often unclear. Implementers must make judgment calls about which semantics they can relax without breaking compatibility. This puts enormous pressure on runtime teams to become spec experts just to achieve acceptable performance.