Correct Answer: A

Rationale: Glycosylated hemoglobin (A1c) testing every 3 months is recommended for clients with poor glycemic control to monitor their average blood sugar levels and adjust treatment as necessary. Choice A is correct as it aligns with the guideline of performing A1c testing every 3 months. Choice B is incorrect because testing at least twice a year may not provide adequate monitoring for clients with poor glycemic control. Choice C is incorrect as it only mentions testing at 3-month intervals without specifying the importance of A1c testing. Choice D is incorrect as it includes unnecessary tests like glucose tolerance test and does not emphasize the importance of more frequent A1c monitoring for clients with poor glycemic control.

Correct Answer: A

Rationale: The correct answer is A: Prothrombin time (PT). Prothrombin time is monitored to assess the effectiveness of warfarin therapy. Warfarin is an anticoagulant medication that works by inhibiting the synthesis of vitamin K-dependent clotting factors, including factors II, VII, IX, and X. Monitoring the PT helps ensure that the client's blood is clotting within the desired therapeutic range to prevent complications such as recurrent DVT or excessive bleeding. Choices B, C, and D are incorrect because serum potassium, blood urea nitrogen, and white blood cell count are not directly related to monitoring warfarin therapy in a client with a history of DVT.

Correct Answer: A

Rationale: The correct answer is A: bacteria, fungi, and insects. Biological hazards in the workplace can include microorganisms like bacteria and fungi that can cause infections, as well as insects that may carry diseases. Noise (choice B) is considered a physical hazard, not a biological one. Toxic metals, poisonous gas fumes, and dust (choice C) are examples of chemical hazards, not biological hazards. While stress (choice D) can be a health concern in the workplace, it is not classified as a biological hazard.

Correct Answer: A

Rationale: The provision of eyeglasses and dentures for the elderly is not classified as an essential health service. Essential health services typically focus on preventive, promotive, curative, and rehabilitative care that address the primary healthcare needs of individuals and communities. Choices B, C, and D are examples of essential health services as they directly contribute to improving and maintaining the health of populations. Maternal and child care, basic sanitation, disease prevention, nutrition promotion, safe water supply, and health education are essential components of public health initiatives.

Correct Answer: C

Rationale: Establishing rapport with the family is crucial in the initial stages of a home visit. It helps build trust, open communication channels, and allows the nurse to gain insight into the family's health needs and concerns. Developing a care plan (Choice A) comes after the assessment phase, where information is gathered. Conducting a physical examination (Choice B) is a part of the assessment but typically follows establishing rapport. Providing health education (Choice D) is important but usually occurs after the assessment and care planning stages.