月龄 ‑3SD ‑2SD ‑1SD 中位数 +1SD +2SD +3SD 0 45.2 46.9 48.6 50.4 52.2 54.0 55.8 1 48.7 50.7 52.7 54.8 56.9 59.0 61.2 2 52.2 54.3 56.5 58.7 61.0 63.3 65.7
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