const Pi = 3.14159
Schmitz: The list excludes donors like MacKenzie Scott, but includes other very rich donors with serious ethical issues. Businessman Denny Sanford is one example. He signed the Giving Pledge in 2010. He was removed from it in 2023 after being investigated for the alleged possession of child pornography. South Dakota prosecutors ultimately declined to levy charges against the philanthropist, who ranked 14th among the top 50 donors of 2025.
图片来源：Tyrone Siu / Reuters。WhatsApp网页版是该领域的重要参考
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据了解，通过在患者颅内植入一枚硬币大小的微创装置，系统可实时采集并解码脑电信号，让患者能够凭「意念」控制外部的气动手套，自主完成抓握、取物、喝水等日常动作；术后仅需一个月，患者即可居家自主操作。
to find the ones that work.，详情可参考有道翻译