干果重量不超过5公斤，价值不超过100新元，应该没问题。https://www.ava.gov.sg/explore-by-sections/food/bringing-food-into-singapore-and-exporting/bringing-food-for-personal-use
新加坡海关网站列出的受管制与禁止入口商品https://www.customs.gov.sg/businesses/importing-goods/controlled-and-prohibited-goods-for-import