Đề ôn thi Đề thi vào lớp 10 Trường Phổ thông Năng khiếu môn Tiếng Anh - Mã đề PTNK-09

Water is one of the most essential elements for life. Did you know that it makes up about 60 percent of an adult's body weight? This high percentage shows just how critical this simple liquid is for our survival and daily functions. Without a sufficient supply, our bodies cannot perform at their best.

We must drink water regularly. (21) __________ our bodies to function properly, a constant intake is necessary. Staying hydrated is crucial for overall health, helping with everything from brain function to physical performance. Drinking enough water is a fundamental habit for maintaining well-being.

Water has several key roles. Firstly, water helps to (22) __________ our body temperature. When we are hot, we sweat, which is our body's way of using water to cool down. In addition, water is vital for nutrient transport. It carries oxygen and essential nutrients to our cells, ensuring they have the fuel they need.

Finally, water is essential for removing waste products from our bodies. The kidneys and liver use water to flush out toxins, which helps prevent them from building up. As a rule of thumb, experts recommend drinking eight glasses a day, though individual needs can vary based on activity level and climate.

The advice from health professionals is clear. My doctor told me that I (23) __________ drink more water if I wanted to feel more energetic. This highlights the direct link between hydration and vitality. If everyone (24) __________ the importance of water, public health would likely improve significantly across communities.

For many students worldwide, academic demands can feel overwhelming. Late-night study sessions, early morning classes, and extracurricular activities often leave young people feeling drained. In this quest for an instant pick-me-up, energy drinks have become a common companion. They promise a quick burst of focus and stamina to power through homework or stay alert during a long lecture. But is this perceived advantage truly beneficial, or are students unknowingly engaging in a risky health gamble when they reach for these popular beverages? [I]

[II] Brands like Sting and Red Bull, with their vibrant packaging and aggressive marketing, are staples in every convenience store and street stall. Their easy accessibility and affordable price points make them readily available to a young, active demographic, including teenagers. When a mid-afternoon slump hits or a boost is needed for an evening cram session, reaching for one of these cans can seem like the most obvious choice.

The immediate "boost" these drinks provide primarily comes from their potent combination of high sugar content and significant doses of caffeine. [III] Caffeine is a well-known stimulant that can temporarily enhance alertness and reduce fatigue, while the added sugars contribute to a sudden rush of energy. This can make you feel more awake, focused, and ready to tackle tasks, which is why many students find them appealing. However, this quick surge often masks the underlying issue of exhaustion rather than truly resolving it.

[IV] However, relying on these artificial pick-me-ups comes with a considerable health gamble. The initial energy spike is often followed by an inevitable "sugar crash," leaving you feeling more tired and irritable. High caffeine intake can lead to jitters, anxiety, headaches, and disrupt crucial sleep patterns, making it harder to focus the next day. Regular consumption can also contribute to dental erosion due to acidity, and in more severe cases, cause heart palpitations or other cardiovascular stress, especially in developing bodies.

Ultimately, while an energy drink might offer a momentary feeling of alertness for that evening class or exam preparation, it’s vital to understand the true cost to your body and mind. Instead of a sustainable solution, they offer a temporary fix with potential long-term drawbacks. For students aged 14-15, it's crucial to prioritize genuine well-being. Opting for balanced nutrition, adequate sleep, regular physical activity, and sufficient water intake are far more effective and healthier ways to maintain focus and energy throughout your demanding academic life. Making informed lifestyle choices is key.