Following the requirements for libraries in the Implementing Rules for Evaluation Standards of Tertiary Hospitals in Guangdong Province and taking municipal or above occupational disease prevention and control institutions as objects,the paper analyzes the construction situations,current collections and operating modes of libraries and discusses the setting of the occupational health information service function from 6 aspects of information sources,service objects and function setting,book retrieval,inter-library loan,service feedback and occupational health information service for labor.

Objective:To discuss the principle and effect of augmentation rhinoplasty with auricular cartilage and expanded polytetrafluoroethylene.Methods:From January 2018 to January 2020, 161 patients (10 males and 151 females; aged from 19 to 48 years, with an average of 26 years) underwent " auricular cartilage plus expanded polytetrafluoroethylene" augmentation rhinoplasty in Nanfang Hospital of Southern Medical University. The expended polytetrafluoroethylene was carved into a willow leaf shape (I Shape) to fill the nasal dorsum, and the cartilage taking from cymba concha was constructed into an arched bridge shape for the nasal tip shaping. Pre-operative and 1-year post-operative measurements nasal length, nasal height, nasal depth, nasal columella height, nasal tip width, nasofrontal angle, nasolabial angle, survey of satisfaction and complication rate 1-2 years after operation were taken. The statistical analysis of nasal morphological indicators and nasal aesthetic indicators were employed.Results:The nose shape of 161 patients was improved to varying degree. All morphological indicators were improved, and difference was statistically significant ( P<0.05). The nasofrontal angle reached the standard in 90 cases, accounting for 55.9%; The nasolabial angle reached the standard in 143 cases, accounting for 88.8%. 2 cases had prosthesis (ePTFE) deviation and were corrected by surgical repair; 1 case had prosthesis (ePTFE) rejection and was corrected by prosthesis (ePTFE) removal surgery. Conclusions:Corresponding to the anatomical characteristics of the external nose, the prosthesis material is designed and made to correspond to the dorsum shape of the nasal stent. The shape of the alar cartilage, the prefabricated arched bridge shape of the cymba concha cartilage are used to reconstruct the nasal tip, which can effectively elevate the nasal dorsum, improve the protruding degree and rotation degree of the nasal tip, and have good long-term support. The flexibility and activity of the nasal tip are similar to the biological nose.