The author is a doctor whose education and experience have spanned over 3 continents- Asia, Europe and North America. He graduated from the University of Hong Kong with an honour degree, a distinction awarded to only handfuls of graduates, since the establishment of the medical school. His training and work encompassed: general medicine; child health; skin and infectious diseases; eye, ear, nose and throat diseases; emergency medicine; general and orthopaedic surgery. The experience in the dual practices of general surgery and family medicine provide the basis for writing this book. While working in the Queen Mary Hospital, University of Hong Kong, he participated in teaching medical students & post-graduates. Subsequently her served as a senior medical officer in general surgery & chief of the casualty departments in the 1,400 beds, Queen Elizabeth Hospital, Hong Kong. In Canada, he had served in various hospitals in the capacities of consultant in general surgery; chief of general surgery; chairman of the medical audit, surgical review and intern education committees etc. His interest in quality medical care, and assurance of such among his colleagues, has won him high praises form the medical community and clients alike. Research papers were published widely in medical journals in Asia, United Kingdom and US Eminently, his scientific paper Quality Assurance in Surgical Practice, had been selected by the American College of Utilization Review Physicians for studies by candidates participating in the specialty board examinations. His 43 years of practical experience is sublimated into this book to provide essential knowledge and principles for enhancing health and safety.