Ключевые слова: 3039 years, business, business person, businessman, concentration, contemplation, corporate business, dedication, emotional stress, entrepreneur, evening, eyeglasses, failure, formal wear, headache, home office, human head, insomnia, laptop, man, mature men, night, office, overworked, pain, problems, rest, serious, technology, tired, work, work at home, workaholic, working late, worried,