Correct Answer: C

Rationale: In response to dehydration, the body compensates by shifting fluids from the interstitial spaces to the intravascular space to maintain blood pressure and perfusion to vital organs. Hemoconcentration and vasoconstriction are other compensatory mechanisms but are less immediate.

Correct Answer: C

Rationale: Masturbation in preschool children is a normal behavior as they explore their bodies. It is best viewed as a natural part of development. Parents are often advised to ignore it and provide distractions rather than making the child feel ashamed or embarrassed. Choice A is incorrect because it is a natural behavior and not considered abnormal in this context. Choice B is incorrect as it does not necessarily disrupt the family. Choice D is incorrect as the focus should be on the child's development and well-being, not on the parents' feelings of embarrassment.

Correct Answer: B

Rationale: Acetaminophen poisoning primarily affects the liver, leading to hepatic involvement, which may present as jaundice, liver failure, or elevated liver enzymes. Hyperpyrexia, severe pain, and drooling are more associated with other types of poisoning.

Correct Answer: A

Rationale: In the case of severe isotonic dehydration, the initial fluid of choice is 0.9% normal saline. This solution is preferred because it helps to restore both fluids and electrolytes effectively. Options B, C, and D are not suitable for the initial management of severe isotonic dehydration. D5 0.2% (1/4) normal saline (Choice B) is a hypotonic solution and might worsen the imbalance. D5W (Choice C) is a hypotonic solution that does not contain electrolytes essential for rehydration. Albumin (Choice D) is a colloid solution used for specific indications like hypoproteinemia or hypoalbuminemia, not for initial rehydration in severe dehydration.

Correct Answer: D

Rationale: High fever, especially in very young infants, or the presence of a stiff neck can indicate a serious infection requiring immediate attention. A fever lasting more than 3 days also warrants medical evaluation.