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: D

Rationale: The correct answer is D. Swelling in the feet can indicate worsening heart failure due to fluid retention, and clients should report this to their healthcare provider immediately. Choices A, B, and C are incorrect because weighing once a week may not provide timely information on fluid retention, timing of diuretic medication is usually advised in the morning to prevent nocturia, and limiting fluid intake to 3 liters per day may not be appropriate for all clients with heart failure.

Correct Answer: B

Rationale: A PaCO2 level of 55 mm Hg indicates hypercapnia, which is common in clients with emphysema but may require further treatment if it leads to respiratory acidosis or distress. Elevated PaCO2 levels can indicate inadequate ventilation and impaired gas exchange, potentially leading to respiratory acidosis. The other results fall within normal ranges or compensated values for a client with chronic emphysema and do not necessarily indicate the need for immediate intervention.

Correct Answer: B

Rationale: The correct answer is B: Conjunctival pallor. In anemia, there is a decrease in hemoglobin levels, leading to paleness of the conjunctiva. This is a common finding in individuals with anemia. Bounding pulse (choice A) is not typically associated with anemia but can be seen in conditions like hyperthyroidism. Elevated blood pressure (choice C) is not a common finding in anemia; instead, blood pressure may be low due to decreased oxygen-carrying capacity. Glossitis (choice D), or a swollen tongue, can be seen in certain types of anemia but is not as specific or common as conjunctival pallor.

Correct Answer: C

Rationale: Jaundice within the first 24 hours of life is considered pathological and may indicate hemolytic disease or another serious condition, requiring further investigation.