01-010 · EVIDENCE A · SOURCE-SENSITIVE
Use a car seat for children under 4, don’t hold them in your arms
给 4 岁以下儿童用安全座椅，不要抱在怀里
A seat costs between 300 and 2,000 yuan and lasts several years. It adds about one minute to each trip to buckle the child in.
For infants under one year old, using a car seat cuts the risk of a fatal injury in a crash by roughly 70%. For children aged 1 to 4, the risk drops by about half. Holding a child in your arms provides no such protection; in a sudden stop you simply cannot keep them secure.
A
Move “Use a car seat for children under 4, don’t hold them in your arms” to Future Me's calendar
The excuse
If I do not open the notes, no new task has technically appeared.
What feels good now
Today I keep a little money, a few minutes and avoid interrupting my default routine.
What the source says
The source summarizes the return this way: “For infants under one year old, using a car seat cuts the risk of a fatal injury in a crash by roughly 70%. For children aged 1 to 4, the risk drops by about half. Holding a child in your arms provides no such protection; in a sudden stop you simply cannot keep them secure.” Evidence grade A. The original states the population, caveats, and sources; this is not a personal forecast.
Use the original facts and limits. For an urgent medical, safety, financial, or legal issue, contact a qualified local professional or service.
THE ENGLISH EDITION
Original recommendation and evidence
10. Use a car seat for children under 4, don’t hold them in your arms
Cost: A seat costs between 300 and 2,000 yuan and lasts several years. It adds about one minute to each trip to buckle the child in.
In plain terms: For infants under one year old, using a car seat cuts the risk of a fatal injury in a crash by roughly 70%. For children aged 1 to 4, the risk drops by about half. Holding a child in your arms provides no such protection; in a sudden stop you simply cannot keep them secure.
Benefit: According to the U.S. National Highway Traffic Safety Administration (NHTSA), car seats lower the risk of fatal injury for infants under one year old by 71% and for children aged 1 to 4 by 54%. The World Health Organization reports a similar 71% reduction in infant deaths.
Evidence grade: A
Sources: NHTSA (2024). Occupant Protection in Passenger Vehicles: 2022 Data (DOT HS 813 573). <https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/813573>; WHO (2025). Road traffic injuries fact sheet. <https://www.who.int/news-room/fact-sheets/detail/road-traffic-injuries>
Notes: Follow the manufacturer’s instructions to install the seat correctly; a faulty installation offers no protection. Infants under one year must be placed rear‑facing. These figures are based on official U.S. crash data.
Read the complete Chinese source and notes
10. 给 4 岁以下儿童用安全座椅，不要抱在怀里
成本: 一个 300 到 2000 元，能用几年。每次上车多花 1 分钟把孩子绑好。
说人话: 一岁以下的婴儿坐安全座椅，车祸里受致命伤的概率低约七成。1 到 4 岁的孩子低约一半。抱在怀里没有这个效果，急刹车时你也抱不住。
收益: 美国交通安全主管部门（NHTSA）估计，用安全座椅能让轿车里 1 岁以下婴儿受致命伤的风险下降 71%。1 到 4 岁的幼儿下降 54%。世界卫生组织（WHO）的口径是婴儿死亡下降 71%
证据等级: A
来源: NHTSA (2024). Occupant Protection in Passenger Vehicles: 2022 Data (DOT HS 813 573). <https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/813573> ; WHO (2025). Road traffic injuries fact sheet. <https://www.who.int/news-room/fact-sheets/detail/road-traffic-injuries>
备注: 按说明书把座椅固定好，装错等于没装。1 岁以下要反向安装，让孩子面朝车尾。上面的数字是美国官方拿事故数据估出来的。
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