请根据自己的见解，总结一下人工智能（AI）目前在社会上的三个主要应用领域，要求用英文回答，以序号形式列出3点。
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1. Healthcare: AI is increasingly used for diagnostic imaging, personalized medicine, and drug discovery, enhancing the accuracy and efficiency of medical treatments.
2. Transportation: AI-powered systems are driving advancements in autonomous vehicles, traffic management, and logistics optimization, improving overall transportation safety and efficiency.
3. Finance: AI applications in fraud detection, risk assessment, and algorithmic trading are revolutionizing the financial industry by providing faster and more accurate decision-making tools.
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