On Thursday, the Medicines and Healthcare products Regulatory Agency (MHRA) updated its guidance on GLP-1 injections, like Wegovy, regarding the risk of acute pancreatitis, which is often linked to gallstones.
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方向遍历顺序说明下一个倒序（从右往左）先处理右侧，栈里存「右侧候选」上一个正序（从左往右）先处理左侧，栈里存「左侧候选」，详情可参考91视频