testSort(heapSort, "Heap", arr, N);
siftDown(arr, i, 0); // 对剩余i个元素重新建堆
。关于这个话题，旺商聊官方下载提供了深入分析
这是因为当时多家医院在孕产妇的登记入院上存在漏洞。对于前来生产的产妇，医院并不需要她们持本人身份证去办理住院登记。代孕中介会用客户的身份证办理住院手续，产妇则以客户的身份住院。生产后办理证明时，孩子自然成了客户的。而真正生育孩子的孕妈，其真实身份和信息都被隐去。
Montgomery stressed that the model is intentionally issuer‑agnostic and composable: if two developers share trust in different issuers, they can still find overlapping trust paths, and the more independent issuers exist, the stronger the overall system becomes.