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   5537篇
  免费   430篇
  国内免费   16篇
耳鼻咽喉   103篇
儿科学   246篇
妇产科学   86篇
基础医学   744篇
口腔科学   81篇
临床医学   448篇
内科学   1185篇
皮肤病学   148篇
神经病学   289篇
特种医学   216篇
外科学   632篇
综合类   339篇
一般理论   4篇
预防医学   344篇
眼科学   84篇
药学   434篇
中国医学   30篇
肿瘤学   570篇
  2022年   68篇
  2021年   121篇
  2020年   68篇
  2019年   100篇
  2018年   133篇
  2017年   82篇
  2016年   119篇
  2015年   124篇
  2014年   169篇
  2013年   211篇
  2012年   356篇
  2011年   346篇
  2010年   206篇
  2009年   180篇
  2008年   289篇
  2007年   311篇
  2006年   223篇
  2005年   198篇
  2004年   196篇
  2003年   181篇
  2002年   151篇
  2001年   161篇
  2000年   163篇
  1999年   160篇
  1998年   82篇
  1997年   74篇
  1996年   58篇
  1995年   55篇
  1994年   54篇
  1993年   45篇
  1992年   120篇
  1991年   81篇
  1990年   78篇
  1989年   104篇
  1988年   59篇
  1987年   70篇
  1986年   57篇
  1985年   75篇
  1984年   42篇
  1983年   30篇
  1982年   34篇
  1979年   28篇
  1977年   45篇
  1976年   27篇
  1975年   26篇
  1974年   32篇
  1973年   41篇
  1972年   34篇
  1971年   29篇
  1967年   33篇
排序方式: 共有5983条查询结果,搜索用时 0 毫秒
51.
OBJECTIVES: The object of this study was to evaluate the results of a comprehensive clinical care pathway (CCP) aimed at reducing the length of hospitalization and overall cost for patients undergoing radical prostatectomy in a setting including both academic and private physicians. METHODS: The clinical records of 1,129 consecutive patients who underwent radical prostatectomy by 24 urologists between July 1, 1990, and December 31, 1996, were reviewed. The factors considered were length of stay, morbidity and mortality, readmission rates, and average cost. The CCP was implemented on January 1, 1994. Its scope was to minimize preoperative evaluation, eliminate the preoperative hospital stay, standardize postoperative care and provide intensive patient education. RESULTS: The average length of stay decreased significantly after implementation of the CCP (8.1 vs. 4.9 days, p = 0.0001). In 1990, there was a large difference in length of stay between academic and private physicians (8.3 vs. 12.6 days) (p = 0. 02) but by 1 year after implementation of the CCP there was virtually no difference (4.69 vs. 4.71 days) (p > 0.05). Complication rates were similar before and after implementation of the CCP. Using the average 1993 cost/case as the baseline preCCP figure, the average cost of radical prostatectomy decreased by 16% in 1994 and by 22% in 1995. CONCLUSIONS: It is possible to successfully implement a CCP in a multi-physician system to reduce length of stay and cost of radical prostatectomy without subjecting the patient to a greater risk of complication.  相似文献   
52.
53.
Banerjee SK 《The Antiseptic》1977,74(9):531-533
The combined oral contraceptive (OC) has become one of the most effective methods of controlling India's staggering population growth. Even the less literate of Indian women have accepted the combined OC with considerable enthusiasm, because they understand that it is a method with a 100% guarantee. As progestogen sensitivity is much more marked than sensitivity to estrogens in India, indicated by the incidence of chloasma and amenorrhea, a trial of a new low dose OC was conducted at the Family Planning Welfare Center of Medical College, Calcutta, India. Lyndiol, 1 mg (ethinylestradiol .05 mg and lynestrenol 1 mg) has low progestogen potency. The trial was initiated in July 1973 and has involved 90 patients over 375 cycles. The patients were selected from married women attending the Family Planning Welfare Center for contraceptive advice. The amount of menstrual flow was unaltered in 81 cases and in 10% of cases there was a reduction of flow as compared with pretreatment menstruation. This compared very favorably with highly progestogenic contraceptives that show a reduction of menstrual flow in over 50% of patients. Only 2 patients complained of breakthrough bleeding or spotting in early cycles. 9 patients (10%) complained of nausea and vomiting in early cycles; 5 patients complained of failure of a withdrawal bleeding in early cycles. Some weight gain was observed in 16 patients (17.7%); 4 patients noted a weight loss. Only 6 patients complained of a headache and 5 of breast engorgement. In this study, 6 patients (6.6%) showed a mean rise of systolic blood pressure of 10 mm and a diastolic pressure of 4 mm. The major risk associated with estrogen/progestogen combination is thromboembolism. In India its incidence is rather low. This trial with Lyndiol 1 mg corroborates this since no thromboembolic occurrences were noted. In sum, Lyndiol (1 mg) is an ideal OC, which is available for Indian mothers with a minimum of side effects.  相似文献   
54.
55.
Here 15 cases of advanced Juvenile angiofibroma are presented. Advantages of wide tumour exposure and preoperative embolization are discussed.  相似文献   
56.
57.
58.
59.
Self-inflicted laryngeal injuries are rare. This is a case of attempted suicide with a knife. The patient was brought into A&E and initial attempts at repair of the laryngo-skeletal structures were performed Later it became evident that the patient had an insensate hypofunctioning larynx. We present a technique aimed at rehabilitating the poorly functioning, incompetent larynx without the necessity for a permanent tracheostomy or laryngectomy. A single surgical procedure combining a cricopharyngeal myotomy, an anterior hyoid suspension and vocal fold angmentations was performed in an attempt to avoid a laryngectomy in non-malignant pathology. The long-term results of this surgery would need to be subjected to further evaluation.  相似文献   
60.
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