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   1647篇
  免费   112篇
  国内免费   9篇
耳鼻咽喉   18篇
儿科学   53篇
妇产科学   50篇
基础医学   283篇
口腔科学   42篇
临床医学   182篇
内科学   327篇
皮肤病学   41篇
神经病学   160篇
特种医学   14篇
外科学   102篇
综合类   14篇
一般理论   6篇
预防医学   186篇
眼科学   14篇
药学   112篇
中国医学   9篇
肿瘤学   155篇
  2023年   17篇
  2022年   5篇
  2021年   30篇
  2020年   22篇
  2019年   34篇
  2018年   42篇
  2017年   34篇
  2016年   51篇
  2015年   49篇
  2014年   67篇
  2013年   98篇
  2012年   125篇
  2011年   125篇
  2010年   74篇
  2009年   66篇
  2008年   96篇
  2007年   131篇
  2006年   105篇
  2005年   116篇
  2004年   87篇
  2003年   93篇
  2002年   82篇
  2001年   9篇
  2000年   3篇
  1999年   11篇
  1998年   15篇
  1997年   10篇
  1996年   10篇
  1995年   13篇
  1994年   10篇
  1993年   10篇
  1992年   10篇
  1991年   8篇
  1990年   4篇
  1989年   6篇
  1987年   4篇
  1985年   4篇
  1984年   5篇
  1983年   3篇
  1982年   6篇
  1981年   10篇
  1980年   7篇
  1979年   5篇
  1978年   5篇
  1977年   6篇
  1974年   3篇
  1973年   4篇
  1972年   4篇
  1968年   4篇
  1967年   4篇
排序方式: 共有1768条查询结果,搜索用时 21 毫秒
1.
2.
3.

Objective

Consumption of energy- and nutrient-dense snacks are recommended for older people to maintain adequate nutrition. We evaluated the effects of dairy-based and energy-enriched berry products consumed as snacks on nutritional and functional status among vulnerable older people receiving home care services.

Design

Randomised controlled study.

Setting and participants

The study sample consisted of 85 home care clients, with mean age of 81.9 (SD 7.1) years in the intervention group (n=50) and 83.7 (SD 8.1) years in the control group (n=35), and 72% women in both groups.

Intervention

In the intervention group, the participants consumed both high-protein dairy-based products and energy-enriched berry purées for three months. The snack products provided nearly 300 kcal and 14 g protein per day.

Measurements

The Mini Nutritional Assessment (MNA), body mass index (BMI), mid-arm muscular area (MAMA) and concentrations of plasma albumin and prealbumin and blood haemoglobin were used to determine nutritional status, and handgrip strength was used to determine functional status at baseline and after the intervention. Results: After adjustment for age and gender, the intervention showed a significant effect on MNA scores (2.1, 95% [CI]: 1.0 to 3.3) (p=0.003), albumin concentration (2.0 g/L, 95% [CI]: 1.1 to 3.2) (p=0.006) and handgrip strength of the right hand in women (2.4 kg, 95% [CI]: 1.2 to 3.3) (p=0.007). The MNA scores improved in the intervention group, while albumin concentration and handgrip strength decreased in the control group.

Conclusions

Regular use of dairy- and energy-enriched berry-based snacks may improve or maintain nutritional and functional status among older people in home care.
  相似文献   
4.
A large number of studies have reported on the validity of autism spectrum disorder (ASD) screening procedures. An overall understanding of these studies’ findings cannot be based solely on the level of internal validity of each, since screening instruments might perform differently according to certain factors in different settings. Europe has led the field with the development of the first screening tool and first prospective screening study of autism. This paper seeks to provide an overview of ASD screening studies and ongoing programmes across Europe, and identify variables that have influenced the outcomes of such studies. Results show that, to date, over 70,000 children have been screened in Europe using 18 different screening procedures. Differences among findings across studies have enabled us to identify ten factors that may influence screening results. Although it is impossible to draw firm conclusions as to which screening procedure is most effective, this analysis might facilitate the choice of a screening method that best fits a specific scenario, and this, in turn, may eventually improve early ASD detection procedures.  相似文献   
5.
6.
7.

Objectives

The aim of this study was to implement and evaluate the outcomes of chemotherapy counselling based on the “Managing Patients on Chemotherapy” module on self-esteem and psychological affect (anxiety, depression) of cancer patients by pharmacists in ten selected government hospitals in Peninsular Malaysia.

Methods

A randomized control trial was conducted among 2120 cancer patients from April 2016 to January 2017 in ten selected government hospitals in Peninsular Malaysia. Cancer patients were randomly assigned to intervention and control groups. The intervention group received chemotherapy counselling by pharmacists based on the “Managing Patients on Chemotherapy” module. The outcomes were assessed at baseline, 1st, 2nd and 3rd follow-ups after counselling. In the course of data analysis; independent sample t-test, chi-square and two-way repeated measures ANOVA were conducted.

Results

Mean scores of self-esteem in the intervention group had significant difference in comparison with those of the control group in the 1st, 2nd and 3rd follow-ups after counselling (P?<?0.0001). Also, among those with depression and anxiety at baseline, there was reduction in depression and anxiety scores after the 1st, 2nd and 3rd follow-ups after counselling (p?<?0.05).

Conclusion

Repetitive counselling by pharmacists based on the “Managing Patients on Chemotherapy” module had positive effect on improving self-esteem and psychological affect of cancer patients undergoing chemotherapy in Peninsular Malaysia.

Practice implications

This module can be used for all Malaysian cancer patients undergoing chemotherapy to improving self-esteem and psychological affect.  相似文献   
8.

OBJECTIVE:

To examine the pattern of tobacco use and knowledge about tobacco-related diseases, as well as to identify popular types of electronic media, in pregnant women, in order to improve strategies for the prevention or cessation of smoking among such women.

METHODS:

A cross-sectional study involving 61 pregnant women, seen at primary care clinics and at a university hospital, in the city of Botucatu, Brazil. For all subjects, we applied the Hospital Anxiety and Depression Scale. For subjects with a history of smoking, we also applied the Fagerström Test for Nicotine Dependence, and we evaluated the level of motivation to quit smoking among the current smokers.

RESULTS:

Of the 61 pregnant women evaluated, 25 (40.9%) were smokers (mean age, 26.4 ± 7.4 years), 24 (39.3%) were former smokers (26.4 ± 8.3 years), and 12 (19.8%) were never-smokers (25.1 ± 7.2 years). Thirty-nine women (63.9%) reported exposure to passive smoking. Of the 49 smokers/former smokers, 13 (26.5%) were aware of the pulmonary consequences of smoking; only 2 (4.1%) were aware of the cardiovascular risks; 23 (46.9%) believed that smoking does not harm the fetus or newborn infant; 21 (42.9%) drank alcohol during pregnancy; 18 (36.7%) reported increased cigarette consumption when drinking; 25 (51.0%) had smoked flavored cigarettes; and 12 (24.5%) had smoked a narghile. Among the 61 pregnant women evaluated, television was the most widely available and favorite form of electronic media (in 85.2%), as well as being the form most preferred (by 49.2%).

CONCLUSIONS:

Among pregnant women, active smoking, passive smoking, and alternative forms of tobacco consumption appear to be highly prevalent, and such women seem to possess little knowledge about the consequences of tobacco use. Educational programs that include information about the consequences of all forms of tobacco use, employing new and effective formats tailored to this particular population, should be developed, in order to promote smoking prevention and cessation among pregnant women. Further samples to explore regional and cultural adaptations should be evaluated.  相似文献   
9.

Purpose

The purpose of the study is to investigate screening in follow-up care to identify head and neck cancer (HNC) patients with untreated psychological distress.

Methods

From November 2009 until December 2012, we investigated the use of OncoQuest (a touch screen computer system to monitor psychological distress (Hospital Anxiety and Depression Scale (HADS)) and quality of life (HRQOL; EORTC QLQ-C30 and H&N35 module) in routine follow-up care. Patients who screened positive for psychological distress (HADS-T >14, HADS-A >7, or HADS-D >7) were asked whether they received psychological or psychiatric treatment.

Results

During the study period of 37 months, OncoQuest was used by 720 individual HNC patients, of whom 714 had complete HADS data. Psychological distress was present in 206 patients (29 %). Of those patients who fulfilled in- and exclusion criteria (n?=?137), 25 received psychological treatment (18 %). Receipt of psychological treatment was significantly related to a higher score on the HADS total scale (19.6 vs. 16.9; p?=?0.019), a lower (worse) score on the EORTC QLQ-C30 scale emotional functioning (46.0 vs. 58.6; p?=?0.023), a higher (worse) score on fatigue (58.2 vs. 46.4; p?=?0.032), problems with sexuality (44.1 vs. 34.4; p?=?0.043), oral pain (43.8 vs. 28.8; p?=?0.011) and speech problems (37.0 vs. 25.3; p?=?0.042).

Conclusions

Screening for psychological distress via OncoQuest is beneficial because 82 % of HNC patients identified with an increased level of distress who do not yet receive mental treatment were identified. Patients who did receive treatment reported more distress and worse quality of life, which may be explained because patients with more severe problems maybe more inclined to seek help or might be detected easier by caregivers and referred to supportive care more often.
  相似文献   
10.
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