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你是一位资深DBA和SQL优化专家。请帮我优化一个慢SQL查询。要求：1. 分析SQL执行计划，找出性能瓶颈；2. 优化建议：索引优化、查询重写、表结构优化；3. 给出优化前后的性能对比（预计）；4. 解释优化原理，让我理解为什么这样改；5. 如果涉及索引，给出创建索引的SQL语句；6. 如果涉及查询重写，给出优化后的完整SQL；7. 注意事项：索引不是越多越好、避免索引失效场景；8. 输出格式：问题分析→优化方案→优化后SQL→原理说明。

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A serene watercolor painting of a mountain village at dawn, mist rolling over green hills, rustic stone houses with smoking chimneys, a small stone bridge crossing a clear stream, wildflowers in the foreground, soft washes of color blending naturally, visible paper texture, loose brushwork, impressionistic style, warm and peaceful atmosphere, high quality art print.

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A hackers workspace in a cyberpunk setting, multiple glowing monitors showing code, dark room lit by neon blue and pink lights, cybernetic implants on desk, rain on window, atmospheric, cyberpunk interior design, detailed, 4K

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写实风格抽象光影艺术，一束光线穿过百叶窗在白色墙壁上投下条纹阴影，灰尘在光柱中飞舞，极简构图，高对比度，黑白摄影风格，建筑摄影感，禅意，安静的氛围，长曝光，细腻的光影过渡，4K，极简艺术壁纸

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动漫风格天空之境风景，乌尤尼盐沼，雨后的盐沼地面如镜面般完美倒映着天空，天空中布满绚丽的晚霞，从粉红到橙黄到紫蓝的渐变，云朵被染成金色，远处有一辆复古巴士行驶在盐沼上，人物剪影站在车旁，新海诚风格，细腻光影，梦幻色彩，高画质插画，4K壁纸

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A cinematic night view of the Eiffel Tower in Paris, sparkling with thousands of golden lights, the tower reflected in the Seine river, boats with warm lights passing by, the city skyline in the background, romantic atmosphere, long exposure photography, light trails from cars, deep blue night sky, warm golden tones, 8K, travel photography, wallpaper worthy, Parisian charm

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Cinematic real estate aerial video, luxury modern villa with infinity pool overlooking the ocean, golden hour lighting, drone slowly orbiting the property, lush landscaping, aspirational lifestyle, 4K HDR, commercial quality

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You are an expert e-commerce copywriter for Amazon. Write a compelling product description for a wireless earbuds. Requirements: 1. Title: brand + key feature + product type + benefit, under 200 characters; 2. 5 bullet points, each starting with a capitalized feature name, then explanation and benefit; 3. Include technical specs (battery life, Bluetooth version, water resistance); 4. Mention use cases (working out, commuting, calls); 5. Product description paragraph with storytelling and benefits; 6. Avoid superlatives and unverified claims; 7. Tone: professional, benefit-driven, 400-500 words total.

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你是一位品牌策划专家，擅长写有温度的品牌故事。请帮我写一篇电商品牌故事文案。要求：1. 开头用创始人的一个真实经历或初心引入；2. 讲述品牌创立的背景和遇到的困难；3. 介绍品牌的核心价值观和产品理念；4. 提到一个代表性产品的研发故事；5. 展示品牌的社会责任感或独特之处；6. 结尾与消费者建立情感连接，发出邀请；7. 语言真诚有温度，不夸大不鸡汤，400-500字，适合品牌详情页/旗舰店首页/公众号。

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粒子汇聚成Logo动画效果，数百万个金色粒子从四面八方汇聚，逐渐形成一个立体的品牌Logo，粒子有光泽和深度，汇聚过程中有光线闪烁，黑色背景，电影级光影，慢动作，4K 60fps，适合品牌开场动画，高端大气

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You are a business communication expert. Please help me translate and polish this business email into professional English. Requirements: 1. Correct grammar and spelling; 2. Professional business tone, appropriate for the relationship (formal/semi-formal/friendly); 3. Clear and concise, avoid redundancy; 4. Proper email structure: subject, greeting, opening, body, closing, signature; 5. Cultural appropriateness for Western business context; 6. Polite but direct, avoid beating around the bush; 7. Keep the original meaning and intention; 8. Output: original → polished translation → explanation of key changes; 9. If multiple tones are possible, provide formal and friendly versions.

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水彩画风格秋日森林小径，金黄和橙红的树叶铺满小径，两旁是高大的枫树和橡树，阳光透过树叶洒下斑驳光影，小径蜿蜒伸向远方，落叶纷飞，远处有一间小木屋，烟囱冒着炊烟，温暖的秋日色调，颜料自然晕染，纸张纹理，宁静温馨，印象派风格，4K高清

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