全文获取类型
收费全文 | 12243篇 |
免费 | 960篇 |
国内免费 | 244篇 |
专业分类
耳鼻咽喉 | 53篇 |
儿科学 | 246篇 |
妇产科学 | 96篇 |
基础医学 | 1626篇 |
口腔科学 | 274篇 |
临床医学 | 1684篇 |
内科学 | 1744篇 |
皮肤病学 | 101篇 |
神经病学 | 2027篇 |
特种医学 | 279篇 |
外科学 | 771篇 |
综合类 | 1166篇 |
一般理论 | 10篇 |
预防医学 | 1867篇 |
眼科学 | 109篇 |
药学 | 792篇 |
3篇 | |
中国医学 | 311篇 |
肿瘤学 | 288篇 |
出版年
2024年 | 37篇 |
2023年 | 274篇 |
2022年 | 359篇 |
2021年 | 572篇 |
2020年 | 425篇 |
2019年 | 492篇 |
2018年 | 460篇 |
2017年 | 460篇 |
2016年 | 440篇 |
2015年 | 446篇 |
2014年 | 655篇 |
2013年 | 1144篇 |
2012年 | 641篇 |
2011年 | 694篇 |
2010年 | 570篇 |
2009年 | 527篇 |
2008年 | 623篇 |
2007年 | 564篇 |
2006年 | 481篇 |
2005年 | 416篇 |
2004年 | 381篇 |
2003年 | 345篇 |
2002年 | 274篇 |
2001年 | 242篇 |
2000年 | 216篇 |
1999年 | 147篇 |
1998年 | 157篇 |
1997年 | 158篇 |
1996年 | 143篇 |
1995年 | 121篇 |
1994年 | 119篇 |
1993年 | 68篇 |
1992年 | 87篇 |
1991年 | 84篇 |
1990年 | 77篇 |
1989年 | 79篇 |
1988年 | 65篇 |
1987年 | 60篇 |
1986年 | 46篇 |
1985年 | 52篇 |
1984年 | 41篇 |
1983年 | 36篇 |
1982年 | 27篇 |
1981年 | 21篇 |
1980年 | 27篇 |
1979年 | 22篇 |
1978年 | 15篇 |
1977年 | 12篇 |
1976年 | 19篇 |
1975年 | 10篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
《The Journal for Nurse Practitioners》2022,18(4):372-376
The effects of climate change include floods, hurricanes, heat waves, and fires; these natural disasters can result in respiratory, cardiovascular, and psychological harm in older adults, who experience the highest morbidity and mortality during heat waves. Advanced practice registered nurses (APRNs) need education on preparing, assessing, and treating older adults for climate-change disasters, especially heat waves. This article will help APRNs understand the effects of climate-change events on the vulnerable older adults and advocates for the need to integrate health effects of climate change into curricula, practicums, policy, and research agendas. 相似文献
2.
3.
4.
AbstractGaining a better grasp on factors related to changes in alcohol use is of particular interest for clinicians. Past research has highlighted a negative link between future time perspective (i.e. a disposition guiding how individuals consider and act regarding their future) and alcohol misuse. However, much remains at stake in the understanding of this association. The objective of this research was to explore bidirectional relationships between future time perspective and severity of alcohol-related problems, in a clinical setting. The sample includes 79 patients followed up in an outpatient alcohol treatment centre. Two measurement times were planned: at entry into care and 6 months later. Multiple linear regression analyses were carried out, controlling for sociodemographic variables. We found that baseline future time perspective predicted level of alcohol-related problems after 6 months in treatment, even when effects of baseline alcohol-related problems and sociodemographic variables were controlled. This study shows that the way patients see and position themselves regarding their future can affect level of alcohol-related problems. It may be useful for clinicians to identify patients with low future time perspective to offer tailored interventions and consider this dimension as a resource for change. 相似文献
5.
《Vaccine》2021,39(34):4759-4765
Dengue vaccination would enhance the control of dengue, one of the most frequent vector-borne viral diseases globally. CYD-TDV is the first dengue vaccine to be licensed, but global uptake has been hampered due to its use being limited to seropositive persons aged 9 years and above, and the need for a 3-dose schedule. The Partnership for Dengue Control (PDC) organized a meeting with key opinion leaders and stakeholders to deliberate on implementation strategies for the use of CYD-TDV. New data have emerged that support the shortening of the primary schedule from a 3 to 2 dose schedule, extending the age range below 9 to 6 years of age, and expanding the indication from endemic populations to also include travelers to endemic areas. Cost-effectiveness may improve with the modified 2-dose regimen and with multiple testing. Strategies to implement a dengue vaccination program have been developed, in particular school-based strategies. A range of delivery scenarios can then be considered, using various settings for each step of the intervention. However, several challenges remain, including communication about limiting the use of this vaccine to seropositive individuals only. Affordability will vary from country to country, as will government commitment and community acceptance. Well-tailored communication strategies that target key stakeholders are expected to make up a significant part of any future dengue vaccination program. 相似文献
6.
7.
8.
Twenty-eight members of the general public, with little nutritional knowledge and no previous commitment to dietary change, completed 7-day-weighed dietary diaries. They then attempted to change their diets, where appropriate, in line with current nutritional guidelines.
The panel achieved changes in diet that were consistent with the recent recommendations but several problems arose. In particular, although fat levels were reduced, energy levels fell and fibre goals were not reached; in addition, certain of the initial vitamin and mineral intakes gave cause for concern. These results emphasize the importance of giving advice not only about foods that might be reduced in the diet, but also about food that might be used as alternatives. They also illustrate the difficulty of persuading people to make radical changes to their eating habits even when given personal advice from a nutritionist.
The panel was small and not necessarily representative, but the results illustrate the need for more dietary analysis studies. It is not enough simply to formulate appropriate guidelines from a nutritional point of view; it is also important to ensure that the public understands them and that people make sensible decisions about their diet. 相似文献
The panel achieved changes in diet that were consistent with the recent recommendations but several problems arose. In particular, although fat levels were reduced, energy levels fell and fibre goals were not reached; in addition, certain of the initial vitamin and mineral intakes gave cause for concern. These results emphasize the importance of giving advice not only about foods that might be reduced in the diet, but also about food that might be used as alternatives. They also illustrate the difficulty of persuading people to make radical changes to their eating habits even when given personal advice from a nutritionist.
The panel was small and not necessarily representative, but the results illustrate the need for more dietary analysis studies. It is not enough simply to formulate appropriate guidelines from a nutritional point of view; it is also important to ensure that the public understands them and that people make sensible decisions about their diet. 相似文献
9.
Joan M. Farrell Ida A. Shaw 《Journal of behavior therapy and experimental psychiatry》2009,40(2):317-328
This study tests the effectiveness of adding an eight-month, thirty-session schema-focused therapy (SFT) group to treatment-as-usual (TAU) individual psychotherapy for borderline personality disorder (BPD). Patients (N = 32) were randomly assigned to SFT-TAU and TAU alone. Dropout was 0% SFT, 25% TAU. Significant reductions in BPD symptoms and global severity of psychiatric symptoms, and improved global functioning with large treatment effect sizes were found in the SFT-TAU group. At the end of treatment, 94% of SFT-TAU compared to 16% of TAU no longer met BPD diagnosis criteria (p < .001). This study supports group SFT as an effective treatment for BPD that leads to recovery and improved overall functioning. 相似文献
10.
Helen J. Michielsen Marcel A. Croon Tineke M. Willemsen Jolanda De Vries Guus L. Van Heck 《Stress and health》2007,23(2):121-130
The main objective of this study was to examine the psychosocial stress model developed by Taylor and Aspinwall with emotional exhaustion as the outcome variable. Respondents, 409 men and 346 women, who had a paid job for at least 20 hours per week, completed questionnaires concerning demographic variables, personality, temperament, work pressure, workload, perceived social support, appraisal, coping, and emotional exhaustion. Structural equation analyses provided only partial support for the validity of the model. First, on theoretical and statistical grounds, one more path linking external resources to social support was added. Second, contrary to expectations, coping styles did not predict emotional exhaustion. To conclude, when coping is measured retrospectively, it does not add to our understanding of emotional exhaustion. It is suggested that future studies should be longitudinal and include objective measures of stressors and psychosocial health outcomes in addition to self‐reports. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献