Correct Answer: A

Rationale: Clients should be instructed to complete the entire course of antibiotics, even if they start feeling better, to prevent antibiotic resistance and recurrence of infection.

Correct Answer: A

Rationale: The correct answer is A: 'If I eat 500 fewer calories per day, I should lose 1 pound per week.' This statement is accurate because a reduction of 500 calories per day typically results in a weight loss of 1 pound per week. This is based on the principle that a calorie deficit of 3,500 calories equals about 1 pound of body fat. Choices B, C, and D are incorrect because they do not align with the established relationship between calorie reduction and weight loss. Eating 450 fewer calories per day would not lead to a weight loss of 2 pounds per week; similarly, reducing calories by 250 or 300 per day would not result in losing 2 pounds or 1 pound per week, respectively.

Correct Answer: A

Rationale: The correct answer is to ensure that electrical cords are not frayed. Frayed electrical cords pose a fire hazard when oxygen is in use. Keeping oxygen tanks in a horizontal position (Choice B) is important to prevent leaks but is not the priority compared to fire safety. Storing extra oxygen tanks in a closed closet (Choice C) is also important but not as immediate as preventing fire hazards. Applying petroleum-based gel to the inside of the nostrils (Choice D) is unrelated to oxygen therapy safety and is not recommended.

Correct Answer: B

Rationale: The correct answer is Baked chicken breast. It is low in sodium and a healthy option for clients with hypertension. Canned tomato soup and processed cheese are typically high in sodium, which is not recommended for individuals with hypertension. Pickled vegetables are also high in sodium and should be avoided in a hypertension-friendly diet.

Correct Answer: D

Rationale: The trough level of vancomycin should be drawn just before the next dose is administered, typically about 30 minutes before the scheduled dose. Since the morning dose is at 0700, the trough level should be drawn at 1800. This timing ensures an accurate measurement of the lowest concentration of the drug in the client's system before the next dose is given. Choice A (2100) is too close to the next dose, choice B (900) is too early, and choice C (1300) is also too far from the next dose.