Correct Answer: D

Rationale: In diabetic ketoacidosis (DKA), there is a state of dehydration and electrolyte imbalance. Normal saline is the initial fluid of choice to help restore intravascular volume and improve electrolyte balance. It also helps to correct acidosis. Potassium chloride IV infusion is commonly added to the treatment regimen once kidney function is confirmed to prevent hypokalemia. Dextrose 5% IV infusion is not the first-line treatment for DKA as it can worsen hyperglycemia. Ringer's Lactate is not typically used as the initial fluid for managing DKA as it contains potassium and could worsen hyperkalemia.

Correct Answer: C

Rationale: The correct answer is C because the muscles in the abdomen and thigh are the most suitable areas for self-administration of insulin due to consistent absorption. Choices A and B are incorrect as aspirating before injecting insulin is unnecessary, and injecting into an extremity to be exercised does not enhance absorption. Choice D is incorrect as alcohol should be used to clean the injection site instead of soap and water, which can cause skin irritation.

Correct Answer: C

Rationale: The most appropriate technique to use when explaining a central line dressing change to a preschool-age client is to let the child perform a dressing change on a doll. Preschool-age children learn best through play and hands-on activities. Allowing the child to practice on a doll helps them understand the procedure in a non-threatening and interactive way. This technique can reduce anxiety, increase cooperation, and enhance the child's understanding of the dressing change process. Choices A and B do not provide a hands-on approach, which is crucial for preschool-age children. Choice D is incorrect as providing an interactive experience is more effective than just showing pictures or giving verbal instructions.

Correct Answer: B

Rationale: The most indicative behavior of a 2-year-old experiencing the initial phase of separation anxiety due to parents not staying all day at the hospital is crying when his parents leave. This behavior is a common manifestation of separation anxiety in children, as they struggle with the absence of their primary attachment figures. Choices A, C, and D are less indicative because withdrawing from the nursing staff, lying quietly in bed, or crying when parents arrive do not specifically demonstrate the distress caused by separation from parents, which is the hallmark of separation anxiety in children.

Correct Answer: A

Rationale: Hypopituitarism is characterized by linear growth retardation with skeletal proportions normal for chronologic age. This means that although the child experiences growth retardation, their skeletal proportions are appropriate for their age, which distinguishes it from other conditions like precocious puberty or equal height and weight affectation. Choice B is incorrect as hypopituitarism does not involve precocious puberty. Choice C is wrong as it describes a different growth pattern not typical of hypopituitarism. Choice D is also incorrect as in hypopituitarism, height and weight are not equally affected, rather the focus is on linear growth retardation with normal skeletal proportions.