Electrons—long used to treat surface tumors and to generate X-rays—are light, nimble particles, far easier to control than protons or carbon ions. At low energies, they stop quickly in tissue, but new high-energy systems can drive electrons deeper. Now researchers are working on machines that combine multiple high-energy beams at different angles to let doctors sculpt radiation doses that match the tumor’s shape.
随着首批项目成功“打样”，自主更新、原拆原建模式由点及面、逐步推广，更多群众的美好生活愿景正在照进现实。
，这一点在line 下載中也有详细论述
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First FT: the day’s biggest stories
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