免费在线包年计算器，使用公式PY=Packs×Years精确计算吸烟包年值，评估肺癌风险。支持自定义包大小，提供终身吸烟包数统计，适用于健康筛查和医疗评估参考。
{
"purchaseCount": 0,
"pv": 6,
"globalHotValue": 0,
"updateDt": 1761672499549,
"hotValue": 0,
"todayChainPv": 0,
"todayGlobalPv": 0,
"americaHotValueDouble": 0,
"globalHotValueDouble": 0,
"todayAmericaPv": 0,
"americaHotValue": 0,
"selectedValueDouble": 791,
"chinaHotValueDouble": 0,
"selectedValue": 791,
"chinaHotValue": 0,
"hotValueDouble": 0
}
