ice cream,drink,onion,…… These nouns are both countable and uncountable. How to distinguish them in different language environments? Thank you

Onion has not been made into a dish, but it can be counted and cut into pieces

Is your food and drink health? A lot of ice cream, hamburgers and cola is not health

food and drink
diet
It's a fixed term, as a whole

ice cream are ____ (health) food.
What should I fill in the blanks?

unhealthy
Ice cream is an unhealthy food

The usage and difference of "drink" and "drinks"

Would you like something to drink?
Drinks is a noun. For example, Sprite and coke can be called together

Is a drink some or some drinks!

He made up his mind never to touch a drop of drink

People, ice, dresser, broccoli, egg, people, cream, volleyball, hamburger, carrot
What are the countable nouns and what are the uncountable nouns

Countable nouns: pear, dresser, egg, volleyball, hamburger, carrot
Uncountable nouns: ice, broccoli, people, cream,

Orange, egg, chicken, milk, which uncountable nouns?

Countable: orange, egg
Uncountable: chicken, milk
Note: when chicken is chicken, it means that one chicken is countable when two chickens are counted

Is egg a countable noun or an uncountable noun

It's countable
Egg, plural egg

Is carrot a countable noun or an uncountable noun

Countable noun

Pear, milk, chicken, carrot, ice cream, bread, straw, salad, rice, tomato, egg
Pear, milk, chicken, carrot, ice cream, bread, straw, salad, rice, tomato, egg, in these words, countable noun is (), uncountable noun is (), both countable and uncountable noun is ()

Countable nouns are (pear, carrot, straw, tomato, salad, egg.),
The uncountable nouns are (milk, ice cream, bread, rice),
Chicken is not only a countable noun but also an uncountable word

ice cream,drink,onion,…… These nouns are both countable and uncountable. How to distinguish them in different language environments? Thank you