Treatment

Treatment
 

Are they both correct? I have this doubt, because I think in this case treatments should be wrong, but using the singular does not sound better:

-The treatments they receive are different.
-The treatment they receive is different.

These two sentences have different meanings.

The first one refers to a procedure such as medical treatments.

The second sentence refers to the quality of the service that the attendant
performs.

Excellent answer. Thank you.

But how about if treatment is talking about how the employer, etc. treats you? He favours men, but despises women. Are both treatment and treaments correct?

No, only "treatment" is correct here.

Excellent answer. Thank you.

Talking about the usage of treatment, do you think of is correct but ambiguous, and for or from should be used instead to make the thing clear?

-The harsh treatment of the parents is made known.

Yes, the sentence

1. The harsh treatment of the parents is made known.

can be ambiguous, as it could refer to the treatment that the parents receive from someone else or to the treatment that the parents give to someone else. Without other context, I probably would assume that the sentence is supposed to describe the treatment that the parents receive from someone else.

To describe the treatment that the parents give to someone else more precisely, one could say either of the following:

2. The harsh treatment by the parents is made known.
3. The harsh treatment from the parents is made known.

Of these two choices, I prefer "by" over "from".

"For" is not correct in this context. The expression "treatment for (something)" is appropriate for a medical intervention as a response to a health issue (that is, "something").

Excellent answer. Thank you.