Correct Answer: B

Rationale: The correct answer is to give the medications sequentially and flush well between them. Ampicillin has a pH of 8-10, while gentamicin has a pH of 3-5.5, making them incompatible when given together. Flushing well between drugs is necessary to prevent any potential interactions. Option A is incorrect because administering both medications simultaneously can lead to incompatibility issues. Option C is incorrect because the nurse should already be aware of the correct administration sequence and not need to consult the physician or pharmacy each time. Option D is incorrect because delaying the second medication by several hours can slow down the treatment of the client's infection, which is not ideal in this scenario.

Correct Answer: B

Rationale: Signs of physical readiness for toilet training include the child's ability to remove his or her own clothing. This ability indicates the child has developed the necessary fine motor skills to manage clothing during toilet training. The other choices are incorrect because temper tantrums, walking for a specific period, and using utensils are not indicators of physical readiness for toilet training.

Correct Answer: B

Rationale: The most appropriate toys for 2- and 3-year-old children in a day-care setting are blocks and push-pull toys. Toddlers enjoy objects of different textures like clay, sand, finger paints, and bubbles, as well as push-pull toys, large balls, and sand and water play. They also like activities such as blocks, painting, coloring with large crayons, large puzzles, and playing with trucks or dolls. Finger paints and card games may be more suitable for older children. Videos and cutting-and-pasting toys are generally more appropriate for preschoolers. Blocks and push-pull toys are beneficial for young children as they help in developing fine motor skills, hand-eye coordination, spatial awareness, and creativity. These toys also encourage imaginative play and problem-solving, making them ideal choices for toddlers.

Correct Answer: D

Rationale: Age-related changes in sleep include reduced sleep efficiency, increased incidence of nocturnal awakening, increased incidence of early-morning awakening, and increased daytime sleepiness. Since the reported data are normal age-related changes, the appropriate action for the nurse would be to document the findings in the medical record. Reporting the findings to the registered nurse is unnecessary as these changes are expected with aging and do not indicate a need for immediate intervention. Prescribing sedatives should be avoided as a first-line approach due to potential side effects and risks, especially in older adults. Encouraging the consumption of stimulants like caffeinated beverages during the daytime may further disrupt sleep patterns, which is counterproductive in addressing the client's reported sleep issues.

Correct Answer: A

Rationale: The correct answer is the pneumococcal vaccine. Children with HIV are at increased risk of pneumococcal infections, so the pneumococcal vaccine is recommended as a supplemental vaccine for them. The hepatitis A vaccine is not routinely given to HIV-positive children unless they have other risk factors for hepatitis A. Lyme disease vaccine is for individuals at risk for Lyme disease, not routinely recommended for a 2-year-old. Typhoid vaccine is typically given to individuals traveling to endemic areas or working in settings with potential exposure to Salmonella typhi, not a routine vaccine for a 2-year-old with HIV.