async function checkEndpoint(url) {
这个恶性循环的逻辑很简单：客流下滑、增长疲态显现→品牌选择区域加密+付费投流→原本原价消费的老客，也转向团购、折扣券消费→门店毛利持续压缩，现金流枯竭→最终只能闭店。
，更多细节参见同城约会
Implementations have had to develop their own strategies for dealing with this. Firefox initially used a linked-list approach that led to O(n) memory growth proportional to the consumption rate difference. In Cloudflare Workers, we opted to implement a shared buffer model where backpressure is signaled by the slowest consumer rather than the fastest.
对违反治安管理的外国人，可以附加适用限期出境或者驱逐出境。
Compressing images