E-textbook rental is a service that allows students to access digital textbooks for a specified period, typically at a fraction of the cost of purchasing new textbooks. Users can rent e-textbooks through online platforms or academic institutions, accessing them on various devices like computers, tablets, or e-readers. This model offers affordability, convenience, and flexibility, making educational resources more accessible to students and other users.

Fintech software, short for financial technology software, refers to applications, platforms, or programs designed to enhance, automate, or streamline financial services and processes using modern technology. It combines financial expertise with innovative tools like artificial intelligence, blockchain, cloud computing, and data analytics to improve efficiency, accessibility, and user experience in areas such as banking, payments, investing, insurance, and personal finance management.

Gait biometrics refers to the technology that is used to measure body movement along with the force and pressure exerted while moving. It is used to identify, track, and treat individuals by understanding their body movements.

Functional safety is the layer of safety that ensures systems respond correctly to faults or abnormal conditions, thus preventing hazardous outcomes. Unlike basic protective measures, functional safety dynamically monitors operations through interconnected components like sensors, logic solvers, and actuators to detect issues and initiate automatic responses.

Flax seeds, also known as linseeds, are small, brown or golden seeds derived from the flax plant (Linum usitatissimum). They are rich in dietary fiber, omega-3 fatty acids, and various essential nutrients. Flax seeds are commonly used as a dietary supplement and ingredient in various foods due to their health benefits, including improved digestion, reduced inflammation, and support for heart health. They can be consumed whole, ground, or as flax seed oil.

Genetic testing includes the use of genetic testing equipment and consumables in laboratories for identifying variations and mutations in nucleic acid sequences and chromosomal structures. The identification of these mutations and variations is used in determining the presence of genetic disorders and diseases, risk predictions, and genetic profiling

General lighting refers to the overall illumination provided in a space to create a uniformly lit environment. This type of lighting is designed to evenly distribute light throughout a room, establishing a comfortable level of brightness that supports daily activities. Unlike task lighting (which is focused, directional light for specific activities like reading or cooking) or accent lighting (which highlights particular features or areas for visual interest), general lighting serves as the foundational light source, reducing deep shadows and glare while creating a pleasant and functional atmosphere.

一季度，主要股指先抑后扬，呈现出典型的结构性行情，主要股指分化明显，市场资金在大小盘风格、行业属性间出现显著偏好差异。截止3月31日，上证指数收报3335.75点，较2024年末下跌0.48%；深证成指收报10504.33点，较2024年末上涨0.86%；沪深300收报3887.31点，较2024年末下跌1.21%；创业板指收报2103.70点，较2024年末下跌1.77%。

2025年一季度，我国债券市场发行规模同比、环比均扩大。2025年一季度，我国债券市场合计发行各类债券207,387.33亿元，同比增加19.45%，环比增加4.71%，单只债券平均发行金额明显上行。同比方面，2025年一季度，债券市场发行规模增量主要由地方政府债、同业存单和国债贡献，分别实现同比增长12,682.38亿元、9,709.00亿元和8,546.90亿元。环比方面，2025年一季度，债券市场发行规模较上季度有所回升。其中，同业存单和国债发行规模回升量最大，分别为6,827.70亿元和6,191.29亿元。净融资额方面，2025年一季度债券市场净融资额为67,354.48亿元，较上年同期增加36,478.88亿元，同比涨幅进一步增长到118.15%；较上季度减少2,440.29亿元，环比减少3.50%。

2025年第一季度，人民币兑美元中间价季度内升值97个基点，主要源于美元指数阶段性走弱，叠加中国央行通过上调跨境融资宏观审慎调节参数等措施稳定市场预期。上季末人民币兑美元中间价收于718.84，一月初开于718.79，截至3月31日人民币兑美元中间价报收717.82。