👶 儿童 BMI（示意）Child BMI (demo)
BMI = kg / m²（百分位需生长曲线，本页只算 BMI）。本地处理。可设置「体重 kg」、「身高 cm」。BMI = kg / m² (percentiles need growth charts - BMI only here). Processed locally. Settings: Weight kg, Height cm.
使用说明与常见问题How-to & FAQ
「儿童 BMI（示意）」是什么？What is the Child BMI (demo) tool?
BMI = kg / m²（百分位需生长曲线，本页只算 BMI）。本地处理。可设置「体重 kg」、「身高 cm」。BMI = kg / m² (percentiles need growth charts - BMI only here). Processed locally. Settings: Weight kg, Height cm.
如何使用「儿童 BMI（示意）」？How do I use the Child BMI (demo) tool?
在「儿童 BMI（示意）」中，填写「体重 kg」、「身高 cm」等参数，结果会随输入实时计算并显示在下方。In the Child BMI (demo): Fill in "Weight kg", "Height cm"; results are recalculated instantly as you type.
成人可以用吗？Can adults use it?
BMI 公式相同：体重(kg) ÷ 身高(m)²。区别在解读：成人用固定界值（如 18.5、25、30），儿童要按年龄和性别查生长曲线得出百分位，本页只给出 BMI 数值。The formula is the same: weight (kg) ÷ height (m)². The difference is interpretation: adults use fixed cut-offs (18.5, 25, 30), while children need age- and sex-specific growth charts for a percentile; this page gives the BMI number only.
哪些输入会被检查？Which inputs are validated?
「儿童 BMI（示意）」会检查这些输入——「体重 kg」、「身高 cm」：必须填写，须大于 0；绝对值超过 10¹⁵ 的数也会被拒绝。不符合时结果区显示具体提示，不会给出数字。The Child BMI (demo) checks its inputs — "Weight kg", "Height cm": required, must be greater than 0; numbers above 10¹⁵ in absolute value are rejected too. When a value fails, the result area names the problem instead of showing a number.
有哪些选项可以调整？What options can I adjust?
「儿童 BMI（示意）」的设置：「体重 kg」默认 25；「身高 cm」默认 120。每次生成结果都按当前设置处理。Settings in the Child BMI (demo) — "Weight kg" default 25; "Height cm" default 120. The result always uses the current settings.
结果可以代替医生的建议吗？Can this replace medical advice?
不能。「儿童 BMI（示意）」基于常用公式给出估算，个体差异较大，如有健康问题请咨询医生或专业人士。No. The Child BMI (demo) gives estimates from common formulas; individuals differ, so consult a doctor or professional for health decisions.
「儿童 BMI（示意）」免费吗？需要注册吗？Is the Child BMI (demo) free? Do I need an account?
「儿童 BMI（示意）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Child BMI (demo) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.