Correct Answer: C

Rationale: Preventing straining at stool is crucial postoperatively after heart surgery for tetralogy of Fallot to avoid increasing intrathoracic pressure and placing stress on the surgical site. This can help prevent complications and promote faster healing. While crying, coughing, and unnecessary movement are common postoperative behaviors, they are not specifically linked to worsening outcomes in this context. Straining at stool is particularly emphasized due to its potential to impact the surgical site and overall recovery process.

Correct Answer: C

Rationale: The correct answer is C because using echolalia (repeating words or phrases) is not typical for a 2-year-old and may indicate the need for further evaluation. Choices A, B, and D are within the expected developmental skills for a 2-year-old. While a 2-year-old may not be able to stand on one foot for an extended period, it is not a concerning developmental milestone at this age. Building a tower of 7 blocks and coloring outside the lines of a picture are both age-appropriate activities that demonstrate fine motor skills and creativity, respectively. However, echolalia at this age could be a sign of an underlying communication or developmental issue that warrants further assessment and monitoring.

Correct Answer: A

Rationale: In situations of divorce, it is crucial for both parents to inform the child together using age-appropriate language. This approach helps maintain consistency and clarity for the child, reducing confusion and anxiety. Choice B is incorrect because reassurance should not be solely focused on love but on explaining the situation appropriately. Choice C may inadvertently send the message that the divorce is the child's fault or requires compensation. Choice D is incorrect as children benefit from understanding and processing emotions in a healthy manner, rather than having them kept hidden.

Correct Answer: B

Rationale: Breastfeeding is recommended to help prevent constipation in infants due to the easily digestible nature of breast milk, which often leads to softer stools. Breastfeeding is preferred over formula feeding as it provides optimal nutrition for the infant's digestive system. Choice A, using a soy formula if necessary, may be considered only if there are specific dietary concerns or allergies; however, breast milk is still the preferred option. Choice C, avoiding administering a suppository nightly, is correct as it is not a routine method for preventing constipation in infants and may not be appropriate without medical advice. Choice D, not offering glucose water between feedings, is recommended as it may not address the root cause of constipation and may introduce unnecessary sugar to the infant's diet.

Correct Answer: B

Rationale: The correct answer is B. Tap water enemas can cause significant fluid and electrolyte imbalances, particularly in infants, making them unsafe for this age group. Choice A is incorrect because tap water enemas do not directly lead to loss of necessary nutrients. Choice C is incorrect as it focuses on emotional impact rather than physiological risks. Choice D is incorrect as shock from a sudden drop in temperature is not a common consequence of a tap water enema in this scenario.