优化：如果某轮没有发生交换，说明已有序，提前结束
Urgent cases are being defined as any patient whose symptoms suggest they need treatment to start the same day or where there is a risk of deterioration if they aren't assessed, such as a child with a high fever and a rash, or a frail older person who has suddenly become confused.
。safew官方下载对此有专业解读
Steven Frank, the co-founder of Panic, wrote this in 1999, with similar themes:
莫娜 · 辛普森是一位美国小说家，代表作《在别处》《凡人》等。她还有两个特殊身份：《辛普森一家》中母亲的角色原型，以及史蒂夫 · 乔布斯的胞妹。