宋詒瑞
上海市人，香港兒童文學作家，語言導師。自幼對語言文字及文學情有獨鍾，亦喜愛兒童。早年畢業於上海幼兒師範學校，六十年代初畢業於北京大學東方語言系，師承季羨林教授。之後在廣播事業局國際廣播電臺工作二十年，赴港定居後曾任國際學校普通話教師及大學對外漢語語言導師。現任香港兒童文藝協會副會長，香港北京大學校友會副秘書長，香港作家聯會會員及監事。
八十年代起活躍於香港兒童文學園地，致力於香港兒童文學創作推廣及寫作教學工作。已出版小說、故事、童話、世界文學名著翻譯及改編本等一百十餘本，善於從生活中取材，文字淺白平實，語言規範，富生活氣息，作品深為香港兒童喜愛，曾多次獲獎，并被評為全港中、小學生年度最受歡迎十大好書及榮登十大好書龍虎榜。并曾撰寫普通話教材、小學語文課文、中文教學補充教材、優秀古文集等，經常擔任寫作比賽評判、兒童創作坊導師、語文教材及普通話教材顧問。
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Description
中國人的故事：發明家和工程師的努力 (宋詒瑞): 56 7. 6 10
作者: 宋詒瑞
《中國人的故事》專為少年兒童而策劃，叢書以六大主題──政治、發明、科學、軍事、醫學、文學，講述古今56位名人的故事。讓讀者了解中國在這些方面的發展和成就，學習名人的品德與精神，進而放眼世界，提升自我。
‧火藥竟然是無意之間發明的？
‧世界最早的地震測量儀是怎樣的？
‧世界上最古老的單孔石橋穩固得連7.6級地震也震不毀？
中國除了四大發明外，還有什麼發明和工程舉世矚目呢？發明家和工程師們背後又付出了多少努力？
本書講述10位中國古今傑出的發明家和工程師的故事，他們是：魯班、李冰、蔡倫、張衡、祖沖之、李春、畢昇、王楨、詹天佑和袁隆平，還有指南針和火藥的發明和流變。讀者可從故事中認識中國在人類文明史上的巨大成就，以及對推動世界文明進程的貢獻。這些發明家和工程師有着無懼困難、百折不撓、刻苦鑽研的精神，很值得我們學習。
‧火藥竟然是無意之間發明的？
‧世界最早的地震測量儀是怎樣的？
‧世界上最古老的單孔石橋穩固得連7.6級地震也震不毀？
中國除了四大發明外，還有什麼發明和工程舉世矚目呢？發明家和工程師們背後又付出了多少努力？
本書講述10位中國古今傑出的發明家和工程師的故事，他們是：魯班、李冰、蔡倫、張衡、祖沖之、李春、畢昇、王楨、詹天佑和袁隆平，還有指南針和火藥的發明和流變。讀者可從故事中認識中國在人類文明史上的巨大成就，以及對推動世界文明進程的貢獻。這些發明家和工程師有着無懼困難、百折不撓、刻苦鑽研的精神，很值得我們學習。
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4.4 ★★★★★
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Product Reviews
★★★★★ 5
My favorite Melatonin supplement
Size: 100 Count (Pack of 1), Style: Melatonin 1mg
I have used this for a few months and really like it. I had previously used a spray that for some reason had added B6 (>2000% RDA) and I developed toxic levels of Vitamin B6 so had to switch. I love that this doesn't have any added garbage including no added flavors, artificial sweeteners or artificial dyes. The taste is fine. It's not candy and isn't supposed to taste like candy. It is just a bland taste that I hardly notice. Dissolves quickly and easily. Love it.
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Reviewed in the United States on September 27, 2024
★★★★★ 5
TLDR: Don't wait! Buy it now! This stuff is really great and I think you're gonna love it!
Size: 90 Count (Pack of 1)
Life Extension Neuro-mag:
I first learned about magnesium l-threonate on YouTube. It was recommended by several physicians there and in person, all of whom consistently make good suggestions in terms of health optimization. Even still, I didn't go for it right away, unsure if this form of magnesium could really be much different than or better than the liquid magnesium from Life Extension that I've been using with great results for several years now. Still, I was curious, as I did some more research and I kept hearing and reading that magnesium l-threonate is “different” because it crosses the blood-brain barrier. Now I'm not gonna try to explain in detail what that is, but I had an understanding of it enough that hearing this further intrigued me. It's my understanding that the human body has this protective measure in place to protect us and for very good reasons so I wanted to be sure I'm making a safe decision for me. As an overview, basically you want the good stuff you consume, that your brain needs to function, to be able to make it to your brain- but not everything. I don't know how our bodies work this out, but apparently they do, so we don't have to figure it out on our own. Imagine that, trying to tell your gut where to send each calorie and nutrient etc.? Anyway, I decided to give this stuff a chance and within 3 days I knew that I will never go without this form of magnesium again if I can help it. For me, it's really that amazing, and of course as a consumer, I hesitate to say, but it's absolutely worth the asking price and more. I've had years of experience with this brand now too and it's been top notch from the packaging to the product, so I will keep buying from Life Extension. With this I sleep better, problem solving is less stressful and my energy level has improved. It does have the relaxing effect on my body that other forms of magnesium do too, but this one has such a profound effect on my mind it's very difficult to quantify, or put into words in text that can even begin to convey or actually help you comprehend just how powerful the effects are. Kind of like the old saying “you had to be there” I suppose. That said, eventually I did buy the magnesium l-threonate from Life Extension and it is quite literally one of the best decisions I've EVER made in my nearly 50 years. It's weird to say that, am I really that old? Seriously, if you do some research and find that the effects sound like the type you might benefit from- buy it!
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Reviewed in the United States on February 24, 2024
★★★★★ 5
Great Product
Size: 90 Count (Pack of 1)
Life Extension’s Neuro-Mag Magnesium L-Threonate is a standout supplement designed to support cognitive health, and after trying it for several months, I can see why it’s so highly regarded. This product contains magnesium L-threonate, a unique form of magnesium that’s specifically formulated to cross the blood-brain barrier, making it highly effective for brain health. Each serving (three vegetarian capsules or one scoop of the tropical punch powder) delivers 2,000 mg of magnesium L-threonate, providing 144 mg of elemental magnesium. Here’s my take on its performance, benefits, and overall experience.
Pros:
• Cognitive Support: I noticed improved mental clarity and focus after about two weeks of consistent use. Tasks that require working memory, like recalling details or multitasking, felt smoother and less taxing. This aligns with research indicating magnesium L-threonate’s ability to enhance synaptic density and cognitive function, particularly in aging individuals.
• Sleep Benefits: While not marketed primarily for sleep, I found that taking it about an hour before bed helped me fall asleep faster and wake up feeling refreshed. This echoes user experiences shared on platforms like X, where some reported better sleep quality and daytime alertness.
• High Absorption: Unlike other magnesium forms like oxide or citrate, which are better for whole-body benefits, magnesium L-threonate is designed for brain absorption. Studies cited by Life Extension show it can boost magnesium levels in cerebrospinal fluid by 15% in animal models, which likely contributes to its cognitive effects.
• Clean Formula: The capsules are gluten-free, non-GMO, and vegetarian, with no major allergens or unnecessary fillers. The powder version has a pleasant tropical punch flavor, making it easy to mix with water or juice.
• Trusted Brand: Life Extension’s rigorous testing for purity and potency gives confidence in the product’s quality. Their transparency, including offering Certificates of Analysis, is reassuring.
Cons:
• Price Point: Neuro-Mag is pricier than standard magnesium supplements, which might be a drawback for budget-conscious buyers. However, the specialized form and targeted benefits justify the cost for those prioritizing brain health.
• Time to Notice Effects: While some users report benefits in as little as six weeks, full effects may take up to 12 weeks, requiring patience.
Final Verdict: Life Extension’s Neuro-Mag Magnesium L-Threonate is a high-quality supplement that delivers on its promise of supporting cognitive health. Its ability to enhance memory, focus, and even sleep quality makes it a worthwhile investment for those prioritizing brain function. Great benefits and clean formulation make it a top choice!
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Reviewed in the United States on June 16, 2025
★★★★★ 5
Effective results
Size: 90 Count (Pack of 1)
This is the only supplement I take where I actually feel its effects. It helps regulate my sleep, helps brain function and anxiety, just makes me feel better overall! And it’s not rough on the stomach at all. Highly recommend!
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Reviewed in the United States on May 19, 2026
★★★★★ 4
Noticeable Support for Calm and Clarity
Size: 90 Count (Pack of 1), Size: 90 Count (Pack of 1)
This magnesium L‑threonate supplement has been a great addition to my daily routine. The capsules are easy to take, gentle on my stomach, and I’ve noticed a clearer, more focused feeling throughout the day. It also brings a nice sense of calm in the evenings without making me groggy. The formula feels clean and well made, and it fits effortlessly into a wellness routine. If you’re looking for a reliable magnesium option that supports relaxation and mental clarity, this one is a solid choice.
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Reviewed in the United States on January 29, 2026