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   2812篇
  免费   134篇
  国内免费   19篇
耳鼻咽喉   6篇
儿科学   55篇
妇产科学   105篇
基础医学   451篇
口腔科学   14篇
临床医学   252篇
内科学   645篇
皮肤病学   32篇
神经病学   419篇
特种医学   42篇
外科学   236篇
综合类   6篇
预防医学   155篇
眼科学   18篇
药学   207篇
中国医学   3篇
肿瘤学   319篇
  2024年   5篇
  2023年   24篇
  2022年   39篇
  2021年   86篇
  2020年   54篇
  2019年   64篇
  2018年   74篇
  2017年   59篇
  2016年   61篇
  2015年   78篇
  2014年   108篇
  2013年   136篇
  2012年   200篇
  2011年   199篇
  2010年   101篇
  2009年   126篇
  2008年   191篇
  2007年   186篇
  2006年   205篇
  2005年   232篇
  2004年   191篇
  2003年   170篇
  2002年   131篇
  2001年   27篇
  2000年   23篇
  1999年   17篇
  1998年   27篇
  1997年   18篇
  1996年   23篇
  1995年   23篇
  1994年   14篇
  1993年   12篇
  1992年   11篇
  1991年   6篇
  1990年   5篇
  1989年   2篇
  1988年   4篇
  1987年   6篇
  1985年   2篇
  1984年   5篇
  1983年   5篇
  1982年   2篇
  1981年   3篇
  1980年   1篇
  1979年   1篇
  1978年   3篇
  1977年   1篇
  1973年   1篇
  1971年   1篇
  1970年   1篇
排序方式: 共有2965条查询结果,搜索用时 15 毫秒
91.
Neuropathy and peripheral artery disease represent the main pathophysiological conditions underlying diabetic foot. Several studies showed that Lipoprotein(a)-Lp(a)-and homocysteine (Hcy) can be associated with diabetic complications, but their relationship with diabetic foot is unclear. Aim of this study was to investigate whether Lp(a) and Hcy were associated with diabetic foot ulcerations, classified according to the presence of peripheral artery disease (PAD) or neuropathy. From among consecutive type 2 diabetic attending at the Diabetic Foot Clinic 27 subjects with vascular diabetic foot (VDF), 43 with neuropathic diabetic foot (NDF) and 52 controls without foot ulceration, neuropathy, and PAD were enrolled. Both Lp(a) (26.1 ± 22.7 vs. 14.9 ± 19.5 mg/dl; P = 0.003) and Hcy levels (15.4 ± 5.7 vs. 12.2 ± 5.1 μmol/l; P = 0.022) were significantly greater in the VDF group than in controls. Lp(a) levels were significantly lower in the NDF group than in controls (6.9 ± 8.1 versus 14.9 ± 19.5 mg/dl; P = 0.009), while no difference in Hcy levels was found. Multiple logistic regression analysis showed that Hcy was associated with VDF (OR: 1.11; 95% CI: 1.07-14.1; P = 0.048). Lp(a) did not enter the model, but its P-value was very near to the significant level (OR: 1.09; 95% CI: 0.99-12.05; P = 0.059). Moreover, low Lp(a) levels were associated with NDF (OR: 0.84; 95% CI: 0.21-0.96; P = 0.039). Our study has shown for the first time that high Lp(a) and Hcy levels are associated with the development of VDF, while low Lp(a) levels appear to be associated with delayed wound healing in patients with neuropathic foot ulcerations.  相似文献   
92.
93.
94.
PurposeTo assess the toxicity and cosmetic results in breast cancer patients undergoing adjuvant partial breast irradiation (PBI) to a total dose of 40 Gy in 10 daily fractions (4 Gy/fraction).Methods and materialsPatients affected by early-stage breast cancer were enrolled in this phase II trial. Patients had to be 60 years old and treated with breast conservative surgery for early stage (pT1–T2 pN0–N1a) invasive ductal carcinoma.Results77 patients were enrolled. Median follow-up was 18 months. The proposed schedule was well tolerated. One patient reported Grade 3 pain at the site of irradiation. Four (5%) patients experience Grade 2 erythema. Late Grade 2 and 1 fibrosis was observed in 3 (4%) and 14 (18%) patients, respectively. Cosmesis was judged “good/excellent” and “poor” in 75 (97%) and in 2 (3%) patients, respectively.Conclusions40 Gy in 10 daily fractions, 4 Gy/fraction, is a well tolerated regimen to deliver PBI.  相似文献   
95.

Background

Active surveillance (AS) is emerging as an alternative approach to limit the risk of overtreatment and impairment of quality of life (QoL) in patients with low-risk localised prostate cancer. Although most patients report high levels of QoL, some men may be distressed by the idea of living with untreated cancer.

Objective

To identify factors associated with poor QoL during AS.

Design, setting, and participants

Between September 2007 and March 2012, 103 patients participated in the Prostate Cancer Research International Active Surveillance (PRIAS) QoL study. Mental health (Symptom Checklist-90), demographic, clinical, and decisional data were assessed at entrance in AS. Health-related QoL (HRQoL) Functional Assessment of Cancer Therapy-Prostate version and Mini-Mental Adjustment to Cancer outcomes were assessed after 10 mo of AS.

Outcome measurements and statistical analysis

Multivariate logistic regression models were used to identify predictors of low (<25th percentile) HRQoL, adjustment to cancer, and a global QoL index at 10 mo after enrolment.

Results and limitations

The mean age of the study patients was 67 yr (standard deviation: ±7 yr). Lack of partner (odds ratio [OR]: 0.08; p = 0.009) and impaired mental health (OR: 1.2, p = 0.1) were associated with low HRQoL (p = 0.006; area under the curve [AUC]: 0.72). The maladaptive adjustment to cancer (p = 0.047; AUC: 0.60) could be predicted by recent diagnosis (OR: 3.3; p = 0.072). Poor global QoL (overall p = 0.02; AUC: 0.85) was predicted by impaired mental health (OR: 1.16; p = 0.070) and time from diagnosis to enrolment in AS <5 mo (OR: 5.52; p = 0.009). Influence of different physicians on the choice of AS (OR: 0.17; p = 0.044), presence of a partner (OR: 0.22; p = 0.065), and diagnostic biopsy with >18 core specimens (OR: 0.89; p = 0.029) were predictors of better QoL. Limitations of this study were the small sample size and the lack of a control group.

Conclusions

Factors predicting poor QoL were lack of a partner, impaired mental health, recent diagnosis, influence of clinicians and lower number of core samples taken at diagnostic biopsy. Educational support from physicians and emotional/social support should be promoted in some cases to prevent poor QoL.  相似文献   
96.
97.
98.
99.
Journal of Neurology - Compression of the median nerve at the carpal tunnel can give demyelinating features and result in distal motor latency (DML) prolongation fulfilling the EFNS/PNS...  相似文献   
100.
Journal of Neurology - Assessing the safety of SARS-CoV-2 mRNA vaccines and the effect of immunotherapies on the seroconversion rate in patients with autoimmune neurological conditions (ANC) is...  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