Writing prompt: Healthy Eating Survey

Student essay:
A lot of hamburgers and ice cream are unhealthy food.Noodles,meat,rice,vegetables and fruit are healthy food but too much meat is not good for children.Cola is a unhealthy drink.Water,milk,juice,tea are healthy drink.Is your food and drink healthy?
What about you?

Corrected essay:
A lot of hamburgers and ice cream are unhealthy food. Noodles, meat, rice, vegetables and fruit are healthy food, but too much meat is not good for children. Cola is an unhealthy drink. Water, milk, juice and tea are healthy drinks. Are your food and drink healthy?
What about you?

Error analysis:
error_sentence: Noodles,meat,rice,vegetables and fruit are healthy food but too much meat is not good for children.
correct_sentence: Noodles, meat, rice, vegetables and fruit are healthy food, but too much meat is not good for children.
correction: ,
error_type: Punctuation Error
error_severity: 2
error_description: Punctuation Error: According to English expression habits, in a compound sentence, when the coordinating conjunction 〈but〉 connects two independent clauses, a comma needs to be added before the conjunction, so 『,』 needs to be added between 〈food〉 and 〈but〉 to separate the two clauses, to conform to expression habits.
error_sentence: Cola is a unhealthy drink.
correct_sentence: Cola is an unhealthy drink.
error: a
correction: an
error_type: Determiner Error
error_severity: 2
error_description: Determiner Error: According to English grammar rules, words beginning with a vowel sound should be modified by the indefinite article 『an』; in the original sentence, 〈unhealthy〉 is a word beginning with a vowel sound, so the article 〈a〉 should be changed to 『an』 to conform to grammar.
error_sentence: Water,milk,juice,tea are healthy drink.
correct_sentence: Water, milk, juice and tea are healthy drinks.
error: ,
correction: and
error_type: Conjunction Error
error_severity: 4
error_description: Conjunction Error: According to English grammar rules, when listing multiple parallel items, the last two components need to be connected by a conjunction; in the original sentence, 〈juice〉 and 〈tea〉 as the last two components of the parallel structure need to be connected by 『and』, so 〈,〉 needs to be replaced with 『and』 to conform to English grammar rules.
error_sentence: Water,milk,juice,tea are healthy drink. Is your food and drink healthy?

correct_sentence: Water, milk, juice and tea are healthy drinks. Are your food and drink healthy?

error: drink.Is
correction: drinks. Are
error_type: Subject-Verb Agreement Error
error_severity: 5
error_description: ① Noun Number Error: According to English grammar rules, in the original sentence, 〈drink〉 should use the plural form 『drinks』 to be consistent with the subject 『Water, milk, juice and tea』, so 〈drink〉 should be changed to 『drinks』 to conform to English grammar rules; ② Subject-Verb Agreement Error: According to English grammar rules, the original sentence has a subject-verb agreement error; the subject 〈food and drink〉 is a plural concept, and the verb 〈Is〉 in the original sentence is in singular form, so 〈Is〉 needs to be changed to the plural form 『Are』 to maintain subject-verb agreement.