帮我编辑这篇文章，使其更具流畅性和可读性。


原文: "Although John was aware of the fact that he needed to work for long hours in order to succeed in his career, he found it difficult to remain focused on his work for extended periods of time because he had a tendency to get distracted easily."
"John knew that working long hours was necessary for his career success, but he struggled to stay focused for extended periods due to easily getting distracted." 

Possible alternative:

"While John acknowledged the importance of putting in long hours toward his career, he found maintaining focus over extended periods to be difficult due to his tendency toward distraction."