首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   182061篇
  免费   34422篇
  国内免费   2541篇
耳鼻咽喉   5469篇
儿科学   5898篇
妇产科学   2804篇
基础医学   8179篇
口腔科学   2467篇
临床医学   29869篇
内科学   54835篇
皮肤病学   7916篇
神经病学   18304篇
特种医学   8232篇
外国民族医学   1篇
外科学   45396篇
综合类   422篇
现状与发展   72篇
一般理论   12篇
预防医学   8380篇
眼科学   3957篇
药学   2845篇
中国医学   72篇
肿瘤学   13894篇
  2024年   522篇
  2023年   4994篇
  2022年   1545篇
  2021年   3876篇
  2020年   6489篇
  2019年   2859篇
  2018年   8135篇
  2017年   7911篇
  2016年   9266篇
  2015年   9348篇
  2014年   16676篇
  2013年   17136篇
  2012年   8013篇
  2011年   8061篇
  2010年   11817篇
  2009年   15529篇
  2008年   8027篇
  2007年   6285篇
  2006年   8673篇
  2005年   5844篇
  2004年   4814篇
  2003年   3715篇
  2002年   3703篇
  2001年   4176篇
  2000年   3313篇
  1999年   3585篇
  1998年   3995篇
  1997年   3725篇
  1996年   3568篇
  1995年   3382篇
  1994年   2101篇
  1993年   1684篇
  1992年   1509篇
  1991年   1520篇
  1990年   1150篇
  1989年   1297篇
  1988年   1106篇
  1987年   936篇
  1986年   967篇
  1985年   792篇
  1984年   602篇
  1983年   590篇
  1982年   571篇
  1981年   453篇
  1980年   411篇
  1979年   366篇
  1978年   389篇
  1977年   451篇
  1975年   334篇
  1972年   354篇
排序方式: 共有10000条查询结果,搜索用时 421 毫秒
111.
112.
Wound pain is a serious problem for elderly patients suffering from chronic leg ulcers, and it may lead to reduced wound healing rates and reduced quality of life. Biatain-Ibu Non-adhesive (Coloplast A/S), a new pain-reducing moist wound healing dressing containing ibuprofen was tested for pain reduction, safety, and efficacy on 10+2 patients in a single-blinded crossover study against Biatain Non-adhesive (Coloplast A/S). Pain was measured with a Numeric Box Scale before, during, and after dressing change. Quality of life was measured using the World Health Organization-5 Well-Being Index. Dressing moist wound healing properties such as absorption capacity and leakage were tested together with assessment of wound exudate and blood plasma content of ibuprofen. Use of the Biatain-Ibu foam dressing correlated with a decrease in pain intensity scores from 7 in the run-in period to approximately 2.5 in the Biatain-Ibu treatment phase. Quality of life measures were improved which together with the reduced pain could contribute to faster wound healing. The moist wound healing properties of Biatain-Ibu were similar to that of the Biatain Non-adhesive and ulcer size was reduced by 24% during the treatment period. Neither side effects nor systemic plasma concentrations of ibuprofen were observed. These data indicate that Biatain-Ibu could reduce persistent and temporary wound pain, increase Quality of life, was found safe to use, and had excellent moist wound healing properties.  相似文献   
113.
114.
115.
116.
117.
118.
Background Hydatid disease is the most severe helminthic zoonosis, with an important public health problem especially in rural areas in Turkey. The aim of this study was to review the problems and advantages encountered in surgical treatment of 43 patients who were ventilated with one-lung ventilation during last four years. Methods Patients, operated with one-lung ventilation, constitute the study group. Data related to symptoms, radiographic findings, performed surgical procedures, perioperative and postoperative morbidity, hospitalization time, and cyst recurrence were collected from each individual's records. Results Cystotomy and capitonnage were performed in all cases. Perioperative complications were seen in 5 patients. Four of these 5 patients had double-lumen endotracheal tube malpositioning. In one patient hypoxemia developed. The most common postoperative complication was atelectasis. One patient had recurrent cysts. There was no perioperative or postoperative death. Conclusions We prefer cystotomy and capitonnage because it is a fast and effective technique with limited postoperative complications. One-lung ventilation prevents the exposure of lower lung areas from massive aspiration, which may cause acute obstruction of airways, and contamination by cyst contents from the operative part of the lung that causes recurrent disease. One-lung ventilation in pulmonary hydatid cyst surgery may be preferred owing to lower mortality and morbidity rates.  相似文献   
119.
SONI NANDA  MD    VINEET RELHAN  MD    CHANDER GROVER  MD  DNB  MNAMS    B.S.N. REDDY  MD  MNAMS 《Dermatologic surgery》2006,32(3):387-392
BACKGROUND: Suction blister epidermal grafting is an established technique for the treatment of resistant and stable vitiligo especially over small and cosmetically important areas like the face. However, certain areas, such as lips and eyelids, require special considerations because of their anatomic peculiarities. PATIENTS AND METHODS: The current study was carried out on six patients of stable eyelid vitiligo, not responding to medical treatment. Suction blister was obtained from the thigh using the suction apparatus and the roof was grafted on to the dermabraded eyelid. Certain precautions were taken during the procedure, which will be highlighted in the current study. RESULTS: Response was excellent in all the patients in 3 to 6 months, with no complications. CONCLUSIONS: If carried out properly, suction blister technique is the procedure of choice for cosmetically important sites like eyelids.  相似文献   
120.
Facet joints play an important role in intervertebral load transmission and are crucial for rotational kinematics. Clinically, the role of facet joints as a possible source of low back pain is seen as controversial and at present is not sufficiently investigated. In this study, human lumbar facet (zygapopyhysial) joints from donors with advanced age were analyzed macroscopically, for degenerative changes. The aim was to determine the extent and morphology of degenerative changes in these joints. Lumbar facet joints (L1–L5) of 32 donors were studied (mean age 80.1±11.2 years). Joint capsules were carefully removed and joint surfaces (5 zones) examined using magnifying glasses and probes. In the result, the majority of facet joints showed cartilage defects of varying extent. Defects were located mostly at the margins of the articular surface, the central zone being relatively well preserved. Defect localization was different between superior (most cartilage defects in superior zone) and inferior (most defects inferiorly) facets. Further, defects were more severe caudal (level of L5) and in older persons. Osteophytes were present in up to 30%, located mostly at the latero-dorsal enthesis of the joint capsule on the superior facet. In conclusion, most margins of the articular facets are subject to degenerative changes in the lumbar spine of elderly persons, the topographical pattern being different in superior and inferior facets. This observation can be explained by the segmental motion patterns during extension/flexion movements of the facets. Sometimes, due to the marginal extension, it is obvious that not all changes can be assessed by CT or MRI.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号